Tootfinder

Landgenoten en mede-aardbewoners, was het niet heerlijk om in de rode mensenmassa te lopen gisteren?
#rodelijn
The people
United
Will Never Be Defeated

Die ePetition 179283 an den Bundestag aus dem Bereich Kraftstoffe für Fahrzeuge mit dem Titel
Spritpreisverordnung nach österreichischem Vorbild
kann bis zum Mittwoch 30. Juli 2025 01:00 UTC mitgezeichnet werden und lautet
Mit der Petition wird eine Festlegung einer Spritpreisverordnung nach dem Modell Österreich, n…

Die ePetition 179283 an den Bundestag aus dem Bereich Kraftstoffe für Fahrzeuge mit dem Titel
Spritpreisverordnung nach österreichischem Vorbild
kann bis zum Mittwoch 30. Juli 2025 01:00 UTC mitgezeichnet werden und lautet
Mit der Petition wird eine Festlegung einer Spritpreisverordnung nach dem Modell Österreich, n…

May 2025 recap | The latest edition of the GÉANT School of Software Engineering, hosted by PCSS, brought together developers and experts from across Europe to explore generative #AI tools, risks, secure coding practices.
Highlights:
🔹#GenAI Buzz-Free Programming with LLMs – training by Maciej Łabędzki…

Responsible AI in Practice: Shaping a Safer Future for AI-Powered Software Development | GÉANT CONNECT Online
Poznań, 20–22 May 2025 — The latest edition of the GÉANT School of Software Engineering, held at the Poznań Supercomputing and Networking Center (PSNC), brought together top-tier developers and experts from across Europe for a deep-dive into generative AI tools, risks, and secure coding practices. At the core of the event was the acclaimed training

South Korea’s New AI Framework Act: A Balancing Act Between Innovation and Regulation
https://fpf.org/blog/south-koreas-new-ai-framework-act-a-balancing-act-between-innovation-and-regulation/

hey quick question
what drugs were the RMII people on
multiplexing a fully asynchronous signal (CRS) with a fully synchronous signal (DV) to get this weird... half-asynchronous-half-synchronous thing where *some* rising edges are referenced to REF_CLK and some are not, but all falling edges are
what is wrong with them? and more importantly how the fuck are you supposed to use it in a MAC??

I have been looking for a screenshot of these icons I drew for gnome as placeholders, but they also encouraged Tuomas Kuosmanen to jump in and fix it, and finally found a copy online!
The “sl” stood for “symbolic link” and “sock” for socket - I used these hand drawn icons for each mime type:
https://linuxgazette.net/165/l…

Look, I’d really like to help with your surveys, but I’m already getting stuck at the first question!
#AcademicChatter #interdisciplinary

Look, I’d really like to help with your surveys, but I’m already getting stuck at the first question!
#AcademicChatter #interdisciplinary

Look, I’d really like to help with your surveys, but I’m already getting stuck at the first question!
#AcademicChatter #interdisciplinary

Announcing sff: A fast, on-the-fly SemanticFileFinder written in Rust! 🦀
It scans a directory (like your notes or a repo), finds the most semantically relevant text chunks for your query, and lets you open the file in a text editor of your choice.
No vector DBs, no GPU needed. Indexes ~2500 files with 10k chunks in 250ms on a CPU.
Perfect for searching Obsidian vaults, codebases, and more.
𝚌𝚊𝚛𝚐𝚘 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚜𝚏𝚏
𝚜𝚏𝚏 "𝚠𝚘𝚛𝚔𝚒𝚗𝚐 𝚠𝚒𝚝𝚑 𝚐𝚒𝚝"

GitHub - do-me/sff: CLI for semantic search on your computer. Searches text files and identifies the most relevant chunks to your query.
CLI for semantic search on your computer. Searches text files and identifies the most relevant chunks to your query. - GitHub - do-me/sff: CLI for semantic search on your computer. Searches text f...

Microgrid Operation Control with Adaptable Droop Gains
E. D. Gomez Anccas, C. A. Hans, D. Schulz
https://arxiv.org/abs/2506.15192 https://

Microgrid Operation Control with Adaptable Droop Gains
Modern low-carbon power systems come with many challenges, such as increased inverter penetration and increased uncertainty from renewable sources and loads. In this context, the microgrid concept is a promising approach, which is based on a segmentation of the grid into independent smaller cells that can run either in grid-connected or standalone mode.In microgrids, droop control is widely used for primary control. It enables proportional power sharing, depending on the droop gains. Operation …

High-efficiency WSe$_2$ photovoltaics enabled by ultra-clean van der Waals contacts
Kamal Kumar Paul, Cullen Chosy, Soumya Sarkar, Zhuangnan Li, Han Yan, Ye Wang, Leyi Loh, Lixin Liu, Hu Young Jeong, Samuel D. Stranks, Yan Wang, Manish Chhowalla
https://arxiv.org/abs/2506.14733

High-efficiency WSe$_2$ photovoltaics enabled by ultra-clean van der Waals contacts
Layered transition metal dichalcogenide semiconductors are interesting for photovoltaics owing to their high solar absorbance and efficient carrier diffusion. Tungsten diselenide (WSe$_2$), in particular, has emerged as a promising solar cell absorber. However, defective metal-semiconductor interfaces have restricted the power conversion efficiency (PCE) to approximately 6%. Here we report WSe$_2$ photovoltaics with a record-high PCE of approximately 11% enabled by ultra-clean indium/gold (In/A…

So, a Chilean TV channel, Telecanal, started broadcasting the Spanish feed of RT...

Little Rock, Minor Rights: Arkansas Leads with COPPA 2.0-Inspired Law
https://fpf.org/blog/little-rock-minor-rights-arkansas-leads-with-coppa-2-0-inspired-law/
@…

Machine learning based prediction of dynamical clustering in granular gases
Sai Preetham Sata, Ralf Stannarius, Benjamin Noack, Dmitry Puzyrev
https://arxiv.org/abs/2506.15657

Machine learning based prediction of dynamical clustering in granular gases
When dense granular gases are continuously excited under microgravity conditions, spatial inhomogeneities of the particle number density can emerge. A significant share of particles may collect in strongly overpopulated regions, called clusters. This dynamical clustering, or gas-cluster transition, is caused by a complex interplay and balance between the energy influx and dissipation in particle collisions. Particle number density, container geometry, and excitation strength influence this tran…

[2025-06-17 Tue (UTC), 131 new articles found for cs.CL Computation and Language]
toXiv_bot_toot

What's coming up during #TNC25 - Part 3
Get a first look at the programme highlights in the carousel below 👇
📌 Explore the full programme − https://tnc25.geant.org/programme/

…

250 Magnetic Tunnel Junctions-Based Probabilistic Ising Machine
Shuhan Yang, Andrea Grimaldi, Youwei Bao, Eleonora Raimondo, Jia Si, Giovanni Finocchio, Hyunsoo Yang
https://arxiv.org/abs/2506.14590

250 Magnetic Tunnel Junctions-Based Probabilistic Ising Machine
In combinatorial optimization, probabilistic Ising machines (PIMs) have gained significant attention for their acceleration of Monte Carlo sampling with the potential to reduce time-to-solution in finding approximate ground states. However, to be viable in real applications, further improvements in scalability and energy efficiency are necessary. One of the promising paths toward achieving this objective is the development of a co-design approach combining different technology layers including …

Cost-Efficient Design for 5G-Enabled MEC Servers under Uncertain User Demands
Yunyi Wu (University of Tsukuba), Yongbing Zhang (University of Tsukuba)
https://arxiv.org/abs/2506.13003

Cost-Efficient Design for 5G-Enabled MEC Servers under Uncertain User Demands
Mobile edge computing (MEC) enhances the performance of 5G networks by enabling low-latency, high-speed services through deploying data units of the base station on edge servers located near mobile users. However, determining the optimal capacity of these servers while dynamically offloading tasks and allocating computing resources to meet uncertain user demands presents significant challenges. This paper focuses on the design and planning of edge servers with the dual objectives of minimizing …

Not sure I really have a good excuse to be carrying around a tote bag right now, but…
If you see me this week, please say hello!

My family (like many) has been broadly impacted by cancer. This analysis from Bernie Sanders office on the impacts of the current administration's failure to continue the crucial work to cure something that impacts so many is infuriating.
https://www.sanders.senate.gov/wp-content/uploads/HELP-Committee-Minority-Report-Trumps-War-on-Science.pdf

Determining the chemical potential via universal density functional learning
Florian Samm\"uller, Matthias Schmidt
https://arxiv.org/abs/2506.15608 ht…

Determining the chemical potential via universal density functional learning
We demonstrate that the machine learning of density functionals allows one to determine simultaneously the equilibrium chemical potential across simulation datasets of inhomogeneous classical fluids. Minimization of an implicit loss function based on an Euler-Lagrange equation yields both the universal one-body direct correlation functional, which is represented locally by a neural network, as well as the system-specific unknown chemical potential values. The method can serve as an efficient al…

Betti numbers in the Random Connection Model for higher-dimensional simplicial complexes and the Boolean model
Dominik Pabst
https://arxiv.org/abs/2506.13429

Betti numbers in the Random Connection Model for higher-dimensional simplicial complexes and the Boolean model
Random simplicial complexes, as generalizations of random graphs, have become increasingly popular in the literature in recent years. In this paper, we consider a new model for a random simplicial complex that was introduced in arXiv:2506.11918, which generalizes the Random Connection Model in a natural way and includes several models used in the literature as special cases. We focus on the marked stationary case with vertices in $R^d\times A$, where the mark space $A$ is an arbitrary Borel spa…

Das war tatsächlich die ERSTE Metal-Band, ohne Modern/Alternative/Core/Post/sonstwas-Zusatz auf dem Leineweber, oder?
Weiter so! 🤘
#Bielefeld #Leinewebermarkt #PlanB

Thermal Conductivity Of Monolayer Hexagonal Boron Nitride: Four-Phonon Scattering And Quantum Sampling Effects
Jos\'e Pedro Alvarinhas Batista, Matthieu J. Verstraete, Alo\"is Castellano
https://arxiv.org/abs/2506.14547

Thermal Conductivity Of Monolayer Hexagonal Boron Nitride: Four-Phonon Scattering And Quantum Sampling Effects
Monolayer hexagonal boron nitride is a prototypical planar 2-dimensional system material and has been the subject of many investigations of its exceptional vibrational, spectroscopic and transport properties. The lattice thermal conductivity remains quite uncertain, with theoretical and experimental reports varying between 218 and 1060 Wm-1K-1. It has a strong temperature evolution and is sensitive to strain effects and isotope concentrations. While the impact of isotope scattering has been wid…

Learning to flock in open space by avoiding collisions and staying together
Martino Brambati, Antonio Celani, Marco Gherardi, Francesco Ginelli
https://arxiv.org/abs/2506.15587

Learning to flock in open space by avoiding collisions and staying together
We investigate the emergence of cohesive flocking in open, boundless space using a multi-agent reinforcement learning framework. Agents integrate positional and orientational information from their closest topological neighbours and learn to balance alignment and attractive interactions by optimizing a local cost function that penalizes both excessive separation and close-range crowding. The resulting Vicsek-like dynamics is robust to algorithmic implementation details and yields cohesive colle…

Die ePetition 179398 an den Bundestag aus dem Bereich Bundesverfassungsgerichtsgesetz mit dem Titel
Reform des Bundesverfassungsgerichts
kann bis zum Mittwoch 16. Juli 2025 01:00 UTC mitgezeichnet werden und lautet
Mit der Petition wird eine Reform des Bundesverfassungsgerichts gefordert. Das Bundesverfassungsgericht sollte nicht nur angerufen werden können, sondern sollte auch proaktiv auf Verstöße reagieren können. Als Richter sollten nur Juristen eingesetzt werden, die k…

In situ growth of a type-II ZnO/ZnS heterostructure:From stability to band-offset
P. R. A de Oliveira, I. Coelho, G. Felix, P. Venezuela, F. Stavale
https://arxiv.org/abs/2506.14499

In situ growth of a type-II ZnO/ZnS heterostructure:From stability to band-offset
We have successfully obtained a ZnO/ZnS heterostructure by heating a ZnS(001) single crystal in a controlled impurities-free oxygen atmosphere. Combining X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM), we explore the stability, electronic structure, and morphology of that interface. Our XPS measurements reveal a binding energy shift of the core-level peaks, indicating a band-bending effect due to the formation of a hybrid ZnO/ZnS interface. In addition, AFM measuremen…

Devitrification and Melting Dynamics in Vapor Deposited Water Ice
Fabio Leoni, Fausto Martelli, John Russo
https://arxiv.org/abs/2506.15433 https://…

Devitrification and Melting Dynamics in Vapor Deposited Water Ice
The equilibration dynamics of ultrastable glasses subjected to heating protocols has attracted recent experimental and theoretical interest. With simulations of the mW water model, we investigate the devitrification and melting dynamics of both conventional quenched (QG) and vapor deposited (DG) amorphous ices under controlled heating ramps. By developing an algorithm to reconstruct hydrogen-bond networks, we show that bond ring statistics correlates with the structural stability of the glasses…

FPF Experts Take The Stage at the 2025 IAPP Global Privacy Summit
https://fpf.org/blog/fpf-experts-take-the-stage-at-the-2025-iapp-global-privacy-summit/
@…

Polarization switching on the open surfaces of the wurtzite ferroelectric nitrides: ferroelectric subsystems and electrochemical reactivity
Yongtao Liu, Anton V. Ievlev, Eugene A. Eliseev, Nana Sun, Kazuki Okamoto, Hiroshi Funakubo, Anna N. Morozovska, Sergei Kalinin
https://arxiv.org/abs/2506.14452

Polarization switching on the open surfaces of the wurtzite ferroelectric nitrides: ferroelectric subsystems and electrochemical reactivity
Binary ferroelectric nitrides are promising materials for information technologies and power electronics. However, polarization switching in these materials is highly unusual. From the structural perspective, polarization reversal is associated with the change of the effective polarity at the surfaces and interfaces from N-to-M terminated, suggesting strong coupling between ferroelectric and chemical phenomena. Phenomenologically, macroscopic studies demonstrate the presence of complex time dep…

🌍🛰️ How do NRENs & RRENs support Earth Observation research?
At our April infoshare with the Group on Earth Observations (GEO), RedCLARA & ASREN, we explored how R&E networks enable Earth Observation research, supporting data access, policy, training, and cross-border collaboration.
Daniela Brauner also shared these insights at GEO Global Forum 2025 last week.
📅 Don’t miss Part 2 of the infoshare series on 27 May!
🔗 Register today:

Infoshare Series on Earth Observations Support Through NRENs - Part 2

Algal Optics
Ming Yang, Sumit Kumar Birwa, Raymond E. Goldstein
https://arxiv.org/abs/2506.15214 https://arxiv.org/pdf/2506.15214

Algal Optics
Nearly a decade ago it was discovered that the spherical cell body of the alga $Chlamydomonas~reinhardtii$ can act as a lens to concentrate incoming light onto the cell's membrane-bound photoreceptor and thereby affect phototaxis. Since many nearly transparent cells in marine environments have complex, often non-axisymmetric shapes, this observation raises fundamental, yet little-explored questions in biological optics about light refraction by the bodies of microorganisms. There are two distin…

A Spintronic Battery with Reversible Modulation of Spin Polarization through Li Charge/Discharge: A First Principles Computational Modelling Case Study for an Antiperovskite System
Sk Mujaffer Hossain, Vinila Bedekara, Priyanka Yadavb, Ram Janay Chudhary, Satishchandra Ogale
https://arxiv.org/abs/2506.14401

A Spintronic Battery with Reversible Modulation of Spin Polarization through Li Charge/Discharge: A First Principles Computational Modelling Case Study for an Antiperovskite System
A key notion defining the progress of the emergent fields of modern electronics, renewable energy, and smart systems is charge storage, which is primarily embodied in various battery chemistries and systems. In addition to the charge property, the electron also has the spin property, which is exploited in the field of spintronics to access novel magnetically controlled device actions that are not accessible to conventional electronics. An interesting question is whether the two can be fruitfull…

Autonomous life-like behavior emerging in active and flexible microstructures
Mengshi Wei, Daniela J. Kraft
https://arxiv.org/abs/2506.15198 https://

Autonomous life-like behavior emerging in active and flexible microstructures
Many organisms leverage an interplay between shape and activity to generate motion and adapt to their environment. Embedding such feedback into synthetic microrobots could eliminate the need for sensors, software, and actuators, yet current realizations are either active but rigid, or flexible but passive. Here, we introduce micrometer-scale structures that integrate both activity and flexibility by 3D microprinting concatenated units and actuating them with an AC electric field. This minimal y…

Unraveling structural and magnetic information during growth of nanocrystalline SrFe12O19
Cecilia Granados-Miralles, Matilde Saura-M\'uzquiz, Espen D. B{\o}jesen, Kirsten M. {\O}. Jensen, Henrik L. Andersen, Mogens Christensen
https://arxiv.org/abs/2506.14332

Unraveling structural and magnetic information during growth of nanocrystalline SrFe12O19
The hydrothermal synthesis of magnetic strontium hexaferrite (SrFe12O19) nanocrystallites was followed in situ using synchrotron powder X-ray diffraction. For all the studied temperatures, the formation of SrFe12O19 happened through an intermediate crystalline phase, identified as the so-called six-line ferrihydrite (FeOOH). The presence of FeOOH has been overlooked in previous studies on hydrothermally synthesized SrFe12O19, despite the phase having a non-trivial influence on the magnetic prop…

Segregation and cooperation in active colloidal binary mixtures
Laura Alvarez, Elena Ses\'e-Sansa, Demian Levis, Ignacio Pagonabarraga, Lucio Isa
https://arxiv.org/abs/2506.15188

Segregation and cooperation in active colloidal binary mixtures
The complex interactions underlying collective motion in biological systems give rise to emergent behaviours such as flocking, sorting, and cooperative transport. These dynamics often involve species with different motilities coordinating movement to optimize navigation and survival. Synthetic analogues based on active colloids offer a controlled platform to explore such behaviours, yet most experimental realizations remain limited to monodisperse systems or mixtures of passive and active parti…

Isostructural electronic transition in MoS$_2$ probed by solid-state high harmonic generation spectroscopy
Bailey R. Nebgen, Victor Chang Lee, Jacob A. Spies, Randy M. Sterbentz, Craig P. Schwartz, Dean Smith, Diana Y. Qiu, Michael W. Zuerch
https://arxiv.org/abs/2506.14215

Isostructural electronic transition in MoS$_2$ probed by solid-state high harmonic generation spectroscopy
Studying materials under extreme pressure in diamond anvil cells (DACs) is key to discovering new states of matter, yet no method currently allows the direct measurement of the electronic structure in this environment. Solid-state high harmonic generation (sHHG) offers a new all-optical window into the electronic structure of materials. We demonstrate sHHG spectroscopy inside a DAC by probing $2H$-MoS$_2$, up to 30 GPa, revealing a pressure-induced crossover of the lowest direct bandgap from th…

Lessons Learned from FPF “Deploying AI Systems” Workshop
https://fpf.org/blog/lessons-learned-from-fpf-deploying-ai-systems-workshop/
@…

Inverse method for determining general molecular weight distribution from polymer rheology
Nihal Pushkar, Xin C. Yee, Jena McCollum, Brandon Runnels
https://arxiv.org/abs/2506.14926

Inverse method for determining general molecular weight distribution from polymer rheology
Determination of polymer molecular weight distribution (MWD) from rheological measurements is desirable due to the ease and low cost of rheometry compared to other methods such as gel permeation chromatography. However, relating MWD to rheology requires the inversion of rheological models, for which there is no analytic solution. Prior approaches assume a functional form for the MWD (such as a lognormal or generalized exponential distribution), minimizing the error with respect to the functiona…

Enhancing gate control and mitigating short channel effects in 20-50 nm channel length single-gate amorphous oxide Thin Film Transistors
Chankeun Yoon, Yuchen Zhou, Ananth Dodabalapur
https://arxiv.org/abs/2506.14156

Enhancing gate control and mitigating short channel effects in 20-50 nm channel length single-gate amorphous oxide Thin Film Transistors
Field-effect transistors (FETs) with single gates are adversely affected by short channel effects such as drain-induced barrier lowering (DIBL) and increases in the magnitude of sub-threshold swing as the channel length is reduced. Dual-gate and gate-all-around geometries are often employed to improve gate control in very short channel length transistors. This can introduce significant process complexity to the device fabrication compared to single-gate transistors. It is shown in this paper th…

[2025-06-19 Thu (UTC), 8 new articles found for cond-mat.soft Soft Condensed Matter]
toXiv_bot_toot

Structural Inhomogeneities and Suppressed Magneto-Structural Coupling in Mn-Substituted GeCo2O4
Shivani Sharma, Pooja Jain, Benny Schundelmier, Chin-Wei Wang, Poonam Yadav, Adrienn Maria Szucs, Kaya Wei, N. P. Lalla, Theo Siegrist
https://arxiv.org/abs/2506.14017

Structural Inhomogeneities and Suppressed Magneto-Structural Coupling in Mn-Substituted GeCo2O4
A comprehensive study of Ge1-xMnxCo2O4 (GMCO) system was conducted using neutron powder diffraction (NPD), x-ray diffraction (XRD), Scanning electron microscopy, magnetometry, and heat capacity measurements. Comparative analysis with GeCo2O4 (GCO) highlights the influence of Mn substitution on the crystal and magnetic structure at low temperature. Surprisingly, phase separation is observed in GMCO with a targeted nominal composition of Ge0.5Mn0.5Co2O4. SEM/EDX analysis reveals that the sample p…

Atomic-scale insights on grain boundary segregation in a cathode battery material
Inger-Emma Nylund, Elise R. Eilertsen, Constantinos A. Hatzoglou, Kaja Eggen Aune, Ruben Bj{\o}rge, Antonius T. J. van Helvoort, Ann Mari Svensson, Paraskevas Kontis
https://arxiv.org/abs/2506.13940

Atomic-scale insights on grain boundary segregation in a cathode battery material
The grain boundary segregation of the Co-free pristine spinel LiNi0.5Mn1.5O4 cathode material has been studied by transmission electron microscopy and atom probe tomography. The segregation of Mn and the depletion of Ni at grain boundaries was observed by electron energy loss spectroscopy. These observations were also confirmed by atom probe tomography at other grain boundaries, which also revealed segregation of O and depletion of Li at grain boundaries. In addition, both methods revealed the …

Extending the capillary wave model to include the effect of bending rigidity: X-ray reflection and diffuse scattering
Chen Shen, Honghu Zhang, Beate Kl\"osgen, Benjamin M. Ocko
https://arxiv.org/abs/2506.14672

Extending the capillary wave model to include the effect of bending rigidity: X-ray reflection and diffuse scattering
The surface roughness of a thin film at a liquid interface exhibits contributions of thermally excited fluctuations. This thermal roughness depends on temperature (T), surface tension ($γ$) and elastic material properties, specifically the bending modulus ($κ$) of the film. A non-zero $κ$ suppresses the thermal roughness at small length scales compared to an interface with zero $κ$, as expressed by the power spectral density (PSD) of the thermal roughness. The description of the X-ray scatt…

Weyl semimetal engineering by symmetry control in NiTe$_2$
Marcos G. O. Junior, Augusto L. Ara\'ujo, Emmanuel V. C. Lopes, Tome M. Schmidt
https://arxiv.org/abs/2506.13908

Weyl semimetal engineering by symmetry control in NiTe$_2$
In this work, we investigate the emergence of Weyl points in an inversion symmetry-breaking 1T-NiTe$_2$ system. Through first-principles calculations based on the density functional theory combined with tight-binding methods, distinct number of Weyl crossings arise under an appropriate symmetry breaking. We identify three sets of Weyl points by breaking the inversion symmetry in NiTe$_2$, resulting in a total of 28 Weyl crossings. The first set comes from the Dirac semimetal, whereas the other …

Towards construction of microscopic model for smart coating of a solid surface
O. Pizio
https://arxiv.org/abs/2506.14628 https://arxi…

Towards construction of microscopic model for smart coating of a solid surface
The density functional approach for classical associating fluids is used to explore the wetting phase diagrams for model systems consisting of water and graphite-like solid surfaces chemically modified by a small amount of grafted chain molecules. The water-like fluid model is adopted from the work of Clark et al. [Mol. Phys., 104, 3561 (2006)]. It very well describes the bulk water vapor-liquid coexistence. Each chain molecule consists of tangentially bonded hard sphere segments. We focus on t…

Designing artificial zinc phosphate tribofilms with tailored mechanical properties by altering the chain length
Sebastian Lellig, Subisha Balakumar, Peter Schweizer, Eva P. Mayer, Simon Evertz, Marcus Hans, Damian M. Holzapfel, Yin Du, Qing Zhou, Martin Dienwiebel, Johann Michler, Jochen M. Schneider
https://arxiv.org/abs/2506.1…

Designing artificial zinc phosphate tribofilms with tailored mechanical properties by altering the chain length
Zinc dialkyldithiophosphate (ZDDP), as the most prominent lubrication additive, forms tribofilms consisting primarily of zinc phosphate glasses containing sulfides. As sulfur is linked to environmental concerns, sulfur-free zinc phosphate coatings have been sputtered from a Zn3(PO4)2 target and investigated here. Based on the bridging to non-bridging oxygen ratio, determined by X-ray photoelectron spectroscopy (XPS), the as deposited coatings are classified as metaphosphates. As the annealing t…

Liquid-gas state regularities as a manifestation of global isomorphism with the Ising model
L. A. Bulavin, V. L. Kulinskii, A. M. Katts, A. M. Maslechko
https://arxiv.org/abs/2506.14622

Liquid-gas state regularities as a manifestation of global isomorphism with the Ising model
Liquid-gas equilibrium is considered using the global isomorphism with the Ising-like (lattice gas) model. Such an approach assumes the existence of the order parameter in terms of which the symmetry of binodal is restored not only in the vicinity of the critical point (critical isomorphism) but also globally in the whole coexistence region. We show how the empirical law of the rectilinear density diameter of the liquid-gas binodal allows us to derive a rather simple form of the isomorphism tra…

[2025-06-18 Wed (UTC), 13 new articles found for cond-mat.mtrl-sci Materials Science]
toXiv_bot_toot

Replica RISM molecular solvation theory for electric double layer in nanoporous materials
A. Kovalenko
https://arxiv.org/abs/2506.14616 https://

Replica RISM molecular solvation theory for electric double layer in nanoporous materials
Applications of 3D-RISM-KH molecular solvation theory range from solvation energy of small molecules to phase behavior of polymers and biomolecules. It predicts the molecular mechanisms of chemical and biomolecular systems. Replica RISM-KH-VM molecular solvation theory predicts and explains the structure, thermodynamics, and electrochemistry of electrolyte solutions sorbed in a nanoporous material. It was tested on nanoporous carbon supercapacitors with aqueous electrolyte and nanoporous electr…

Replaced article(s) found for cond-mat.mtrl-sci. https://arxiv.org/list/cond-mat.mtrl-sci/new
[1/1]:
Origin of unexpected weak Gilbert damping in the LSMO/Pt bilayer system

Mutual effect of charge- and number-density correlations in ionic liquids and concentrated electrolytes
O. Patsahan, A. Ciach
https://arxiv.org/abs/2506.14604

Mutual effect of charge- and number-density correlations in ionic liquids and concentrated electrolytes
Correlation functions in concentrated ionic systems are studied within the mesoscopic theory at the level of the Gaussian approximation. The previously neglected fluctuation contribution to the inverse charge-charge correlation function is taken into account to verify the accuracy of the previous results. We calculate the correlation lengths and the amplitudes and show that the fluctuation contribution does not lead to significant changes of the results. We also derive necessary conditions for …

Anomalous diffusion for mass transport phenomena II: Subdiffusion in polydimethylsiloxane (PDMS)
Nathaniel G. Hermann, Dmitry A. Markov, M. Shane Hutson
https://arxiv.org/abs/2506.14600

Anomalous diffusion for mass transport phenomena II: Subdiffusion in polydimethylsiloxane (PDMS)
Polydimethylsiloxane (PDMS) is a glassy polymer widely used in biomedical engineering, namely in microfluidics applications. However, PDMS is known to interact with hydrophobic chemicals. This interaction is exacerbated at the scale of microfluidics, making careful modeling of in-device concentrations vital for PDMS-based microfluidic devices. While it has been previously reported that many chemicals diffuse through PDMS, here we report that diffusion in PDMS is anomalous, i.e. characterized by…

Coarsening Kinetics in Active Model B : Macroscale and Microscale Phase Separation
Pradeep Kumar Yadav, Shradha Mishra, Sanjay Puri
https://arxiv.org/abs/2506.14548

Coarsening Kinetics in Active Model B+: Macroscale and Microscale Phase Separation
We perform a comprehensive numerical investigation of the coarsening kinetics of active Brownian particles modeled by the {\it Active Model B+} (AMB+). This model was introduced by Tjhung et al. [Phys. Rev. X {\bf 8}, 031080 (2018)] and is a generalization of Model B for a conserved order parameter, with two additional activity terms. These terms correspond to rotation-free current (of strength $λ$) and rotational current (of strength $ξ$). We find that the presence of rotational current $(ξ…

Cyclically sheared colloidal gels: structural change and delayed failure time
Himangsu Bhaumik, James E. Hallett, Tanniemola B. Liverpool, Robert L. Jack, C. Patrick Royall
https://arxiv.org/abs/2506.14408

Cyclically sheared colloidal gels: structural change and delayed failure time
We present experiments and simulations on cyclically sheared colloidal gels, and probe their behaviour on several different length scales. The shearing induces structural changes in the experimental gel, changing particles' neighborhoods and reorganizing the mesoscopic pores. These results are mirrored in computer simulations of a model gel-former, which show how the material evolves down the energy landscape under shearing, for small strains. By systematic variation of simulation parameters, w…

Coupling Anisotropic Curvature and Nematic Order: Mechanisms of Membrane Shape Remodeling
Yoav Ravid, Samo Peni\v{c}, Luka Mesarec, Nir S. Gov, Veronika Kralj-Igli\v{c}, Ale\v{s} Igli\v{c}, Mitja Drab
https://arxiv.org/abs/2506.14347

Coupling Anisotropic Curvature and Nematic Order: Mechanisms of Membrane Shape Remodeling
This study theoretically investigates how anisotropic curved membrane components (CMCs) control vesicle morphology through curvature sensing, nematic alignment, topological defects, and volume constraints. By comparing arc-shaped and saddle-shaped CMCs, we identify a rich spectrum of steady-state phases. For fully CMC-covered vesicles, arc-shaped components drive a pearling-to-cylinder transition as nematic interactions strengthen, while on partially CMC-covered vesicles, the saddle-shaped CMCs…

Random organization criticality with long-range hydrodynamic interactions
Tristan Jocteur, Cesare Nardini, Eric Bertin, Romain Mari
https://arxiv.org/abs/2506.14330

Random organization criticality with long-range hydrodynamic interactions
Driven soft athermal systems may display a reversible-irreversible transition between an absorbing, arrested state and an active phase where a steady-state dynamics sets in. A paradigmatic example consists in cyclically sheared suspensions under stroboscopic observation, for which in absence of contacts during a shear cycle particle trajectories are reversible and the stroboscopic dynamics is frozen, while contacts lead to diffusive stroboscopic motion. The Random Organization Model (ROM), whic…

Controlling energy delivery with bistable nanostructures
Andreas Ehrmann, Carl P. Goodrich
https://arxiv.org/abs/2506.14266 https://a…

Controlling energy delivery with bistable nanostructures
Countless biological processes are fueled by energy-rich molecules like ATP and GTP that supply energy with extreme efficiency. However, designing similar energy-delivery schemes from the bottom up, essential for the development of powered nanostructures and other {\it de novo} machinery, presents a significant challenge: how can an energy-rich structure be stable in solution yet still deliver this energy at precisely the right time? In this paper, we present a purely physical mechanism that so…

Compositional fluctuations and polymorph selection in crystallization of model soft colloids
Abhilasha Kumari, Gadha Ramesh, Debasish Koner, Rakesh S. Singh, Mantu Santra
https://arxiv.org/abs/2506.14109

Compositional fluctuations and polymorph selection in crystallization of model soft colloids
Understanding polymorph selection in atomic and molecular systems and its control through thermodynamic conditions and external factors (such as seed characteristics) is fundamental to the design of targeted materials and holds great significance in materials sciences. In this work, using Monte Carlo simulations on the Gaussian Core Model and Hard-Core Yukawa colloidal systems, we investigated the control of polymorph selection and explored the underlying mechanisms by tuning thermodynamic para…

Mechanically Interlocked Polymers in Dilute Solution under Shear and Extensional Flows: A Brownian Dynamics Study
Ali Seyedi, Alex Albaugh
https://arxiv.org/abs/2506.13968

Mechanically Interlocked Polymers in Dilute Solution under Shear and Extensional Flows: A Brownian Dynamics Study
Mechanically interlocked polymers (MIPs) are a novel class of polymer structures in which the components are connected by mechanical bonds instead of covalent bonds. We measure the single-molecule rheological properties of polyrotaxanes, daisy chains, and polycatenanes under steady shear and steady uniaxial extension using coarse-grained Brownian dynamics simulations with hydrodynamic interactions. We obtain key rheological features, including tumbling dynamics, molecular extension, stress, and…

AutoSAS: a new human-aside-the-loop paradigm for automated SAS fitting for high throughput and autonomous experimentation
Duncan R. Sutherland, Rachel Ford, Yun Liu, Tyler B. Martin, Peter A. Beaucage
https://arxiv.org/abs/2506.13918

AutoSAS: a new human-aside-the-loop paradigm for automated SAS fitting for high throughput and autonomous experimentation
The advancement of artificial-intelligence driven autonomous experiments demands physics-based modeling and decision-making processes, not only to improve the accuracy of the experimental trajectory but also to increase trust by allowing transparent human-machine collaboration. High-quality structural characterization techniques (e.g., X-ray, neutron, or static light scattering) are a particularly relevant example of this need: they provide invaluable information but are challenging to analyze …

[2025-06-18 Wed (UTC), 14 new articles found for cond-mat.soft Soft Condensed Matter]
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Replaced article(s) found for cond-mat.soft. https://arxiv.org/list/cond-mat.soft/new
[1/1]:
- Active particle in a very thin interfacial droplet
Airi N. Kato, Kaili Xie, Benjamin Gorin, Jean-Michel Rampnoux, Hamid Kellay

Replaced article(s) found for cond-mat.mtrl-sci. https://arxiv.org/list/cond-mat.mtrl-sci/new
[1/1]:
Accelerating Discovery of Metal-Insulator Transition Compounds Using Physics-Informed Machine Lea...

Catalogue of chiral phonon materials
Yue Yang, Zhenyu Xiao, Yu Mao, Zhanghuan Li, Zhenyang Wang, Tianqi Deng, Yanhao Tang, Zhi-Da Song, Yuan Li, Huiqiu Yuan, Ming Shi, Yuanfeng Xu
https://arxiv.org/abs/2506.13721

Catalogue of chiral phonon materials
Chiral phonons, circularly polarized lattice vibrations carrying intrinsic angular momentum, offer unprecedented opportunities for controlling heat flow, manipulating quantum states through spin-phonon coupling, and realizing exotic transport phenomena. Despite their fundamental importance, a universal framework for identifying and classifying these elusive excitations has remained out of reach. Here, we address this challenge by establishing a comprehensive symmetry-based theory that systemati…

Photomagnetic-Chiral Anisotropy mediated by Chirality-Driven Asymmetric Spin Splitting
Tianwei Ouyang, Hang Su, Wanning Zhang, Yingying Duan, Yuxi Fang, Shunai Che, Yizhou Liu
https://arxiv.org/abs/2506.13696

Photomagnetic-Chiral Anisotropy mediated by Chirality-Driven Asymmetric Spin Splitting
Photo-magnetic effects (PMEs), intrinsic to transition metals, arises from the interaction between light-induced angu-lar momentum and electronic spin. These effects are suppressed in noble metals with high symmetry and electron density. Introducing chiral structures can induce photomagnetic-chiral anisotropy (PM-ChA) of metals by linking chirality and spin dynamics. However, a theoretical explain remains elusive. Here, we investigated the mechanism of PM-ChA in tetrahelix-stacked chiral nanost…

Significant role of first-principles electron-phonon coupling in the electronic and thermoelectric properties of LiZnAs and ScAgC semiconductors
Vinod Kumar Solet, Sudhir K. Pandey
https://arxiv.org/abs/2506.13675

Significant role of first-principles electron-phonon coupling in the electronic and thermoelectric properties of LiZnAs and ScAgC semiconductors
The half-Heusler (hH) compounds are currently considered promising thermoelectric (TE) materials due to their favorable thermopower and electrical conductivity. Accurate estimates of these properties are therefore highly desirable and require a detailed understanding of the microscopic mechanisms that govern transport. To enable such estimations, we carry out comprehensive first-principles computations of one of the primary factors limiting carrier transport, namely the electron-phonon ($e-ph$)…

Faceting transition in aluminum as a grain boundary phase transition
Yoonji Choi, Tobias Brink
https://arxiv.org/abs/2506.13550 https://

Faceting transition in aluminum as a grain boundary phase transition
Grain boundaries facet due to anisotropic grain boundary energies: While the faceted boundary has a larger area than the corresponding straight boundary, a significantly lower energy of the facets compared to a straight segment can drive the faceting. This picture is complicated by faceting/defaceting transitions where the free energy difference between the two states depends on the temperature. Here, we use atomistic computer simulations to show how such a transition in a $Σ3$ $[11\overline{1…

Extrinsic Dopants as Growth Modifiers in Cu-Cr-O delafossites: A Study of Incorporation Limits and Film Properties
Marco Moreira, Yves Fleming, Patrick Grysan, Christele Vergne, Adrian Marie Philippe, Petru Lunca-Popa
https://arxiv.org/abs/2506.13540

Extrinsic Dopants as Growth Modifiers in Cu-Cr-O delafossites: A Study of Incorporation Limits and Film Properties
Cu-Cr-O delafossite thin films were grown by metal-organic chemical vapor deposition with various extrinsic dopants (Al, Mg, Mn, Sc, Y, and Zn) targeted at 5 at % to investigate how such doping influences their structure and properties. X-ray photoelectron spectroscopy revealed that the actual dopant incorporation is well below the nominal 5 %, with only Al and Sc present above detection. An off-stoichiometric Cu-Cr-O composition is determined, with no secondary phases detected. Transmission el…

On the ambient conditions crystal structure of AgSbTe2
Baihong Sun, Sergei Grazhdannikov, Muhamed Dawod, Lunhua He, Jiazheng Hao, Thomas Meier, Yansun Yao, Yaron Amouyal, Elissaios Stavrou
https://arxiv.org/abs/2506.13526

On the ambient conditions crystal structure of AgSbTe2
We present a combined X-ray and neutron diffraction, Raman spectroscopy, and 121Sb NMR studies of AgSbTe2, supported by first-principles calculations aiming to elucidate its crystal structure. While diffraction methods cannot unambiguously resolve the structure, Raman and NMR data, together with electric field gradient calculations, strongly support the rhombohedral R-3m phase. Moreover, the agreement between experimental and calculated Raman spectra further corroborates this result, resolving …

Nonlinear bulk photocurrent probe Z2 topological phase transition
Debasis Dutta, Raihan Ahammed, Yingdong Wei, Xiaokai Pan, Xiaoshuang Chen, Lin Wang, Amit Agarwal
https://arxiv.org/abs/2506.13493

Nonlinear bulk photocurrent probe Z2 topological phase transition
Detecting topological phase transitions in bulk is challenging due to the limitations of surface sensitive probes like ARPES. Here, we demonstrate that nonlinear bulk photocurrents, specifically shift and injection currents, serve as effective probes of Z_2 topological transitions. These photocurrents show a robust polarity reversal across the Z_2 phase transition, offering a direct optical signature that distinguishes strong topological phases from weak or trivial ones. This effect originates …

A first-principles investigation of altermagnetism in CrSb2 under applied pressure
R. Tamang, Shivraj Gurung, Shalika Ram Bhandari, Matthew J. Stitz, Ganesh Pokharel, Keshav Shrestha, D. P. Rai
https://arxiv.org/abs/2506.13454

A first-principles investigation of altermagnetism in CrSb2 under applied pressure
In this study, we employed first-principles density functional theory (DFT) calculations within the GGA+U framework to explore the electronic and magnetic properties of CrSb2 under varying hydrostatic pressures. CrSb2 exhibits non-relativistic spin splitting (NRSS) of around 0.5 eV around the Fermi level and the d-wave symmetric Fermi surface. Our magnetic susceptibility measurements further confirm the collinear antiferromagnetic (AFM) ground state in CrSb2 , a prerequisite for altermagnetism.…

Electronic Correlations Control Interlayer Coupling and Magnetic Transition in MnBi$_2$Te$_4$/MnBr$_3$ Heterostructure
Yuanhao Zhu, Xixi Yuan, Ying Zhao, Jin Zhang, Zijing Ding, Huixia Fu
https://arxiv.org/abs/2506.13448

Electronic Correlations Control Interlayer Coupling and Magnetic Transition in MnBi$_2$Te$_4$/MnBr$_3$ Heterostructure
Bulk MnBi$_2$Te$_4$ (MBT) is an intrinsic antiferromagnetic topological insulator. However, its low Néel temperature of $\sim 25\,\mathrm{K}$ severely restricts its practical applications. Here, we propose a van der Waals heterostructure composed of monolayer MBT (ML-MBT) and monolayer MnBr$_3$, an intrinsic Chern insulator possessing a high Curie temperature ($T_\mathrm{C} \sim 200\,\mathrm{K}$). By employing density functional theory calculations and Monte Carlo simulations, we demonstrate t…

Sodium induced beneficial effects in wide bandgap Cu(In,Ga)S2 solar cell with 15.7% efficiency
Arivazhagan Valluvar Oli, Kulwinder Kaur, Michele Melchiorre, Aubin Jean-Claude Mireille Prot, Sevan Gharabeiki, Yucheng Hu, Gunnar Kusch, Adam Hultqvist, Tobias T\"orndahl, Wolfram Hempel, Wolfram Witte, Rachel A. Oliver, Susanne Siebentritt
https://

Sodium induced beneficial effects in wide bandgap Cu(In,Ga)S2 solar cell with 15.7% efficiency
This study underscores the pivotal role of sodium (Na) supply in optimizing the optoelectronic properties of wide bandgap (~1.6 eV) Cu(In,Ga)S2 (CIGS) thin film absorbers for high efficiency solar cells. Our findings demonstrate that the synergistic use of Na from the glass substrate, in conjunction with in-situ sodium fluoride (NaF) co-evaporation, significantly enhances the structural and optoelectronic properties of the CIGS. CIGS grown under either Na-deficient or excess conditions exhibits…

2D MXene-Based Photocatalysts for Efficient Water Splitting and Hydrogen Evolution: A brief review
C. B. Subba, Prasad Mattipally, J. Sivakumar, A. Laref, A. Yvaz, D. P. Rai, Z. Pachuau
https://arxiv.org/abs/2506.13411

2D MXene-Based Photocatalysts for Efficient Water Splitting and Hydrogen Evolution: A brief review
Photocatalytic water splitting offers a viable and sustainable method for hydrogen production. MXenes, a class of 2D transition-metal carbides/nitrides, have emerged as potential photocatalysts and co-catalysts due to their tunable electronic properties, high conductivity, and surface functionality. This review explores recent advances in MXene-based photocatalysts for hydrogen production, discussing their synthesis, electronic structures, and photocatalytic mechanisms. The key challenges, incl…

Crystal field tuned spin-flip luminescence in NiPS3
L\'eonard Schue, Nashra Pistawala, Hebatalla Elnaggar, Yannick Klein, Christophe Bellin, Johan Biscaras, Fausto Sirotti, Yves Lassailly, Fabian Cadiz, Luminita Harnagea, Abhay Shukla
https://arxiv.org/abs/2506.13381

Crystal field tuned spin-flip luminescence in NiPS3
Layered magnetic materials potentially hold the key to future applications based on optical control and manipulation of magnetism. NiPS3, a prototype member of this family, is antiferromagnetic below 155 K and exhibits sharp photoluminescence associated to a transition between a triplet ground state and a singlet excited state. The nature of the luminescent transition is a matter of current debate and so is an eventual fundamental link of this excitation to magnetism. Here we provide answers th…

Replaced article(s) found for cond-mat.soft. https://arxiv.org/list/cond-mat.soft/new
[1/1]:
Active nematic response to a deformable body or boundary: elastic deformations and anchoring-indu...

Inferring Material Parameters from Current-Voltage Curves in Organic Solar Cells via Neural-Network-Based Surrogate Models
Eunchi Kim, Paula Hartnagel, Barbara Urbano, Leonard Christen, Thomas Kirchartz
https://arxiv.org/abs/2506.13308

Inferring Material Parameters from Current-Voltage Curves in Organic Solar Cells via Neural-Network-Based Surrogate Models
Machine learning has emerged as a promising approach for estimating material parameters in solar cells. Traditional methods for parameter extraction often rely on time-consuming numerical simulations that fail to capture the full complexity of the parameter space and discard valuable information from suboptimal simulations. In this study, we introduce a novel workflow for parameter estimation in organic solar cells based on a combination of numerical simulations and neural networks. The workflo…

On the diffusion of hard sphere fluids in disordered porous media: New extended Enskog theory description
M. F. Holovko, M. Ya. Korvatska
https://arxiv.org/abs/2506.13483

On the diffusion of hard sphere fluids in disordered porous media: New extended Enskog theory description
We proposed a new extended version of Enskog theory for the description of the self-diffusion coefficient of a colloidal hard-sphere fluid adsorbed in a matrix of disordered hard-sphere obstacles. In a considered approach instead of contact values of the fluid-fluid and fluid-matrix pair distribution functions, we introduced by input the new functions that include the dependence on the fraction of the volume free from matrix particles and from fluid particles trapped by matrix particles. It is …

Penta-twinned gold nanoparticles under pressure: a comprehensive study
Camino Mart\'in-S\'ancheza, Ana S\'anchez-Iglesias, Jos\'e Antonio Barreda-Arg\"ueso, Jean-Paul Iti\'e, Paul Chauvigne, Luis M. Liz-Marz\'an, Fernando Rodr\'iguez
https://arxiv.org/abs/2506.13236…

Penta-twinned gold nanoparticles under pressure: a comprehensive study
We report on the high-pressure optical and mechanical properties of penta-twinned gold nanoparticles (PT-AuNPs) of different geometries: decahedra, rods and bipyramids. Our results show that, unlike single-crystal (SC-AuNPs), PT-AuNPs preserve both their non-cubic crystal structures and their overall morphology up to 30 GPa. This structural integrity under compression is related to an enhanced mechanical resilience of PT-AuNPs, despite exhibiting bulk moduli comparable to those of SC-AuNPs. Not…

Uncovering the nanoscopic phase behavior of ternary solutions in the presence of electrolytes: from pre-Ouzo to Ouzo region
Mingbo Li, Rushi Lai, Yadi Tian, Yawen Gao, Benlong Wang, Chao Sun
https://arxiv.org/abs/2506.13377

Uncovering the nanoscopic phase behavior of ternary solutions in the presence of electrolytes: from pre-Ouzo to Ouzo region
In this work, we report a comprehensive study of how electrolyte addition governs the structure and stability of surfactant-free microemulsions in a trans-anethol/ethanol/water system. The universal structural response has been validated, spanning the full range of solution dispersed-phase structurings, from sub-10 nm W/O reverse-aggregates to O/W mesoscopic droplets (~100 nm) and classical Ouzo droplets (~1 μm). Experimental results reveal that there is a threshold for electrolyte levels abov…

Ab initio functional-independent calculations of the clamped Pockels tensor of tetragonal barium titanate
Virginie de Mestral, Lorenzo Bastonero, Michele Kotiuga, Marko Mladenovic, Nicola Marzari, Mathieu Luisier
https://arxiv.org/abs/2506.13209

Ab initio functional-independent calculations of the clamped Pockels tensor of tetragonal barium titanate
We present an ab initio method to calculate the clamped Pockels tensor of ferroelectric materials from density-functional theory, the modern theory of polarization exploiting the electric-enthalpy functional, and automated first- and second-order finite-difference derivatives of the polarizations and the Hellmann-Feynman forces. Thanks to the functional-independent capabilities of our approach, we can determine the Pockels tensor of tetragonal barium titanate (BTO) beyond the local density appr…

Hydrogen bond symmetrization in high-pressure ice clathrates
Lorenzo Monacelli, Maria Rescigno, Alasdair Nicholls, Umbertoluca Ranieri, Simone Di Cataldo, Livia Eleonora Bove
https://arxiv.org/abs/2506.13169

Hydrogen bond symmetrization in high-pressure ice clathrates
Hydrogen bond symmetrization is a fundamental pressure-induced transformation in which the distinction between donor and acceptor sites vanishes, resulting in a symmetric hydrogen-bond network. While extensively studied in pure ice, most notably during the ice VII to ice X transition, this phenomenon remains less well characterized in hydrogen hydrates. In this work, we investigate hydrogen bond symmetrization in the high-pressure phases of hydrogen hydrate (H2-H2O and H2-D2O) through a combine…

Tuning the Viscosity and Jamming Point in Dense Active non-Brownian Suspensions
Bhanu Prasad Bhowmik
https://arxiv.org/abs/2506.13316 https://

Tuning the Viscosity and Jamming Point in Dense Active non-Brownian Suspensions
Using numerical simulations, we study the rheological response of dense non-Brownian suspensions containing active particles. The active particles are modelled as run-and-tumble particles with three controlling parameters: the fraction of active particles in the system, an active force applied to the particles, and a persistence time after which the direction of the active force changes randomly. Our simulations reveal that the presence of activity can reduce the viscosity (by an order of magni…

Monte Carlo simulations of crystal defects in open ensembles
Flynn Walsh, Babak Sadigh, Joseph T. McKeown, Timofey Frolov
https://arxiv.org/abs/2506.12985 …

Monte Carlo simulations of crystal defects in open ensembles
Open materials systems are often inaccessible to conventional atomistic simulations, which add and remove atoms by creating high-energy defects that may be sampled with vanishing probability. This longstanding challenge motivates a new Hamiltonian Monte Carlo method that maps the grand canonical problem to a canonical system involving non-interacting fictitious particles. To trial deletions or insertions, a real or fictitious particle is selected according to an energy-based biasing scheme and …

Non-reciprocal interactions reshape cells in a model for symbiosis
Maitane Mu\~noz-Basagoiti, Michael Wassermair, Miguel Amaral, Buzz Baum, An{\dj}ela \v{S}ari\'c
https://arxiv.org/abs/2506.13299

Non-reciprocal interactions reshape cells in a model for symbiosis
The shape of a cell influences and it is influenced by interactions with its neighbouring partners. Here, we introduce a coarse-grained model of non-reciprocal interactions between single-cell organisms to study emergent morphologies during symbiotic association. We show that the cell membrane can be remodelled into branched protrusions, invaginations, transient blebs and other dynamical phases that depend on the number of interacting partners, the asymmetry, and the magnitude of partnership ac…

Optimisation of Activator Solutions for Geopolymer Synthesis: Thermochemical Stability, Sequencing, and Standardisation
Ramon Skane, Franca Jones, Arie van Riessen, Evan Jamieson, Xiao Sun, William D. A. Rickard
https://arxiv.org/abs/2506.12941

Optimisation of Activator Solutions for Geopolymer Synthesis: Thermochemical Stability, Sequencing, and Standardisation
Geopolymers present a sustainable alternative to conventional binders, however, their commercial viability is hindered by a lack of standardised methods for preparing stabile activator solutions; alkaline feedstocks critical to geopolymer synthesis. This study presents a combined experimental and modelling approach to evaluate the thermochemical stability, solubility constraints, and silica speciation behaviour of sodium silicate-based activators. Using quantitative 29Si NMR analysis, thermodyn…

Two-photon 3D printing of functional microstructures inside living cells
Marusa Mur, Aljaz Kavcic, Uros Jagodic, Rok Podlipec, Matjaz Humar
https://arxiv.org/abs/2506.13232

Two-photon 3D printing of functional microstructures inside living cells
3D printing has revolutionized numerous scientific fields and industries, with printing in biological systems emerging as a rapidly advancing area of research. However, its application to the subcellular level remains largely unexplored. Here, we demonstrate for the first time the fabrication of custom-shaped polymeric microstructures directly inside living cells using two-photon polymerization. A biocompatible photoresist is injected into live cells and selectively polymerized with a femtoseco…

Density-Independent Glassy Behavior in the High-Density Phase of Motility-Induced Phase Separation
Toranosuke Umemura, Issei Sakai, Takuma Akimoto
https://arxiv.org/abs/2506.13140

Density-Independent Glassy Behavior in the High-Density Phase of Motility-Induced Phase Separation
We investigate the nonequilibrium dynamics of active matter using a two-dimensional active Brownian particles model. In these systems, self-propelled particles undergo motility-induced phase separation (MIPS), spontaneously segregating into dense and dilute phases. We find that in the high-density phase, local particle mobility exhibits glassy behavior, with diffusivity remaining unchanged despite variations in the global system density. As global density increases further, the system undergoes…

Implementing van der Waals forces for polytope particles in DEM simulations of clay
Dominik Krengel, Jian Chen, Zhipeng Yu, Hans-Georg Matuttis, Takashi Matsushima
https://arxiv.org/abs/2506.13046

Implementing van der Waals forces for polytope particles in DEM simulations of clay
Clay minerals are non-spherical nano-scale particles that usually form flocculated, house-of-card like structures under the influence of inter-molecular forces. Numerical modeling of clays is still in its infancy as the required inter-particle forces are available only for spherical particles. A polytope approach would allow shape-accurate forces and torques while simultaneously being more performant. The Anandarajah solution provides an analytical formulation for van der Waals forces for cuboi…

Flocking as a second-order phase transition in self-aligning active crystals
Marco Musacchio, Alexander P. Antonov, Hartmut L\"owen, Lorenzo Caprini
https://arxiv.org/abs/2506.12967

Flocking as a second-order phase transition in self-aligning active crystals
We study a two-dimensional crystal composed of active units governed by self-alignment. This mechanism induces a torque that aligns a particle's orientation with its velocity and leads to a phase transition from a disordered to a flocking crystal. Here, we provide the first microscopic theory that analytically maps the crystal dynamics onto a Landau-Ginzburg model, in which the velocity-dependent effective free energy undergoes a transition from a single-well shape to a Mexican-hat profile. As …

Kinetic theory of coupled binary-fluid-surfactant systems
Alexandra J. Hardy, Samuel Cameron, Steven McDonald, Abdallah Daddi-Moussa-Ider, Elsen Tjhung
https://arxiv.org/abs/2506.12955

Kinetic theory of coupled binary-fluid-surfactant systems
We derive a self-consistent hydrodynamic theory of coupled binary-fluid-surfactant systems from the underlying microscopic physics using Rayleigh's variational principle. At the microscopic level, surfactant molecules are modelled as dumbbells that exert forces and torques on the fluid and interface while undergoing Brownian motion. We obtain the overdamped stochastic dynamics of these particles from a Rayleighian dissipation functional, which we then coarse-grain to derive a set of continuum e…

Structure-Dynamics Correlation and Its Link to Fragility and Dynamic Heterogeneity
Mohit Sharma, Srikanth Sastry, Sarika Maitra Bhattacharyya
https://arxiv.org/abs/2506.12773

Structure-Dynamics Correlation and Its Link to Fragility and Dynamic Heterogeneity
Understanding the connection between structure, dynamics, and fragility (the rate at which relaxation times grow with decreasing temperature) is central to unraveling the glass transition. Fragility is often linked to dynamic heterogeneity, and thus it is commonly assumed that if structure influences dynamics, more fragile systems should exhibit stronger structure--dynamics correlations. In this study, we test the generality of this assumption using three model systems: Lennard-Jones (LJ) and W…

Nanodroplets Condensation on Solid Surfaces
Matteo Teodori, Dario Abbondanza, Mirko Gallo, Carlo Massimo Casciola
https://arxiv.org/abs/2506.12565 https://…

Nanodroplets Condensation on Solid Surfaces
This paper deals with the condensation of liquid droplets on hydrophobic and hydrophilic surfaces. A stochastic mesoscale model based on the theory of fluctuating hydrodynamics and the thermodynamics of a diffuse interface approach shows how direct simulation of the vapour-liquid transition from the nucleation process to droplet hydrodynamics can be achieved. Such simulations explain the role of wettability in filmwise and dropwise condensation regimes and the main limitations of classical nucl…

Clustering and emergent hyperuniformity by breaking microswimmer shape and actuation symmetries
Anson G. Thambi, William E. Uspal
https://arxiv.org/abs/2506.12293

Clustering and emergent hyperuniformity by breaking microswimmer shape and actuation symmetries
Hydrodynamic interactions driven by particle activity are ubiquitous in active colloidal systems. Although these interactions are strongly influenced by the interfacial actuation mechanism and geometry of the swimming particles, theoretical understanding of how these microscopic design parameters govern collective dynamics remains limited. Here, we investigate the collective dynamics of oblate spheroidal microswimmers. Using an approximate kinetic theory and corroborating boundary element metho…

Chirality across scales in tissue dynamics
Sihan Chen, Doruk Efe G\"okmen, Michel Fruchart, Miriam Krumbein, Pascal Silberzan, Victor Yashunsky, Vincenzo Vitelli
https://arxiv.org/abs/2506.12276

Chirality across scales in tissue dynamics
Chiral processes that lack mirror symmetry pervade nature from enantioselective molecular interactions to the asymmetric development of organisms. An outstanding challenge at the interface between physics and biology consists in bridging the multiple scales between microscopic and macroscopic chirality. Here, we combine theory, experiments and modern inference algorithms to study a paradigmatic example of dynamic chirality transfer across scales: the generation of tissue-scale flows from subcel…

Asymmetric Effects Underlying Dynamic Heterogeneity in Miscible Blends of Poly(methyl methacrylate) with Poly(ethylene oxide)
Shannon Zhang, Michael A. Webb
https://arxiv.org/abs/2506.12143

Asymmetric Effects Underlying Dynamic Heterogeneity in Miscible Blends of Poly(methyl methacrylate) with Poly(ethylene oxide)
The emergence of spatially variable local dynamics, or dynamic heterogeneity, is common in multicomponent polymer systems. Such heterogeneity is understood to arise from differences between the intrinsic dynamical fluctuations associated with one component versus another. However, the nature of the dynamic coupling between these components and how it depends on composition, temperature, and environmental fluctuations is not fully understood. Here, we use molecular dynamics simulations to charac…

[2025-06-17 Tue (UTC), 14 new articles found for cond-mat.soft Soft Condensed Matter]
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