Tootfinder

Why does Hanuš the space-spider never call Janus the Czech cosmonaut, Janus? And Hanuš instead keeps calling Janus "skinny man"? I don't protest this about the movie. No, I think I love it.
Also I love how all the dialogue feels translated. As if it's not natively written in English. The post-neo-Soviet vibe, it fits the narrative so well.
a mini-review of Spaceman (2024) ..: 📝

Spaceman (2024, March; Netflix)
Why does Hanuš the space-spider never call Janus the Czech cosmonaut, Janus? And Hanuš instead keeps calling Janus "skinny man"? I don't protest this about the movie. No, I think I love it. Also I l…

This https://arxiv.org/abs/2312.17594 has been replaced.
initial toot: https://mastoxiv.page/@a…

Utilizing the Janus MoSSe surface polarization property in complementary metal-oxide-semiconductor field effect transistor design
Janus transition metal dichalcogenides (JTMDs) have attracted much attention because of their outstanding electronic and optical properties. The additional out-of-plane dipole in JTMDs can form n- and p-like Ohmic contacts, and this may be used in device applications such as pin diodes and photovoltaic cells. In this study, we exploit this property to design n- and p-type metal-oxide-semiconductor field effect transistors (MOSFETs). First, we use density-functional theory calculations to study …

Phase Behavior and Dynamics of Active Brownian Particles in an Alignment Field
Sameh Othman, Jiarul Midya, Thorsten Auth, Gerhard Gompper
https://arxiv.org/abs/2403.02947

Phase Behavior and Dynamics of Active Brownian Particles in an Alignment Field
Self-propelled particles that are subject to noise are a well-established generic model system for active matter. A homogeneous alignment field can be used to orient the direction of the self-propulsion velocity and to model systems like phoretic Janus particles with a magnetic dipole moment or magnetotactic bacteria in an external magnetic field. Computer simulations are used to predict the phase behavior and dynamics of self-propelled Brownian particles in a homogeneous alignment field in two…

This https://arxiv.org/abs/2312.17594 has been replaced.
initial toot: https://mastoxiv.page/@a…

Utilizing the Janus MoSSe surface polarization property in complementary metal-oxide-semiconductor field effect transistor design
Janus transition metal dichalcogenides (JTMDs) have attracted much attention because of their outstanding electronic and optical properties. The additional out-of-plane dipole in JTMDs can form n- and p-like Ohmic contacts, and this may be used in device applications such as pin diodes and photovoltaic cells. In this study, we exploit this property to design n- and p-type metal-oxide-semiconductor field effect transistors (MOSFETs). First, we use density-functional theory calculations to study …

This https://arxiv.org/abs/2311.03022 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Janus microswimmers are poor hydrodynamic mixers
The generation of fluid flows by autophoretic microswimmers has been proposed as a mechanism to enhance mass transport and mixing at the micro- and nanoscale. Here, we experimentally investigate the ability of model 2-D "active baths" of photocatalytic silica-titania Janus microspheres to enhance the diffusivity of tracer particles at different microswimmer densities below the onset of collective behaviour. Inspired by the similarities between our experimental findings and previous results for …

#MeinErstesPixi. Nein, wahrscheinlich nicht mein erstes, aber mein liebstes! Wobei das Ersterscheinungsjahr 1976 genau das Jahr war, in dem ich lesen lernte. Ich erzählte mal davon (es war inzwischen verschollen). Das hörte eine Volontärin vom Carlsen Verlag. Und bei nächster Gelegenheit schenkte sie mir die 3. Auflage von 1998 (im Foto). Das tolle an dem Buch: Jan wird kreativ. Ein bissche…

Computational Study Based Prediction of New Photocatalysts for water splitting by systematic manipulation of MXene surfaces
Swati Shaw, Subhradip Ghosh
https://arxiv.org/abs/2404.03146

Computational Study Based Prediction of New Photocatalysts for water splitting by systematic manipulation of MXene surfaces
The compositional and structural flexibility of functionalised two-dimensional metal carbonitrides or MXenes has been exploited through a combinatorial search for new materials that can act as catalysts for photo-assisted water splitting by absorbing sunlight with energy in the infra-red region. Detailed calculations on 49 Janus MXenes where two surfaces are of asymmetric nature are carried out by first-principles Density Functional Theory. A screening procedure is adopted to arrive at potentia…

Altså, han er jo vildt dygtig, Janus Wiberg, men man har ligesom hŸrt det fŸr, har man ikke?
#melodigrandprix

Symmetry-breaking-induced giant Stark effect in 2D Janus materials
Jiang-Yu Lu, Wu-Yu Chen, Lei Li, Tao Huang, Hui Wan, Zi-Xuan Yang, Gui-Fang Huang, Wangyu Hu, Wei-Qing Huang
https://arxiv.org/abs/2402.12795

Symmetry-breaking-induced giant Stark effect in 2D Janus materials
Symmetry breaking generally induce exotic physical properties, particularly for low-dimensional materials. Herein we demonstrate that symmetry breaking induces a giant Stark effect in 2D Janus materials using group IV-V monolayers with a four-atom-layer structure as a model system, which are constructed by Ge and As element substitution of symmetrical SnSb monolayer. A linear giant Stark effect is found in Janus semiconductor monolayers, as verified by the band gap variation up to 134 meV of Sn…

Janus Bound States in the Continuum with Asymmetric Topological Charges and Intrinsic Chirality
Meng Kang, Meng Xiao, C. T. Chan
https://arxiv.org/abs/2402.12689

Janus Bound States in the Continuum with Asymmetric Topological Charges and Intrinsic Chirality
We propose a novel topological defect called Janus bound states in the continuum (BICs), featuring asymmetric topological charges in upward and downward radiation channels. Our approach involves a photonic crystal slab (PCS) that initially exhibits both out-of-plane and in-plane mirror symmetry, and this PCS possesses one BIC at the $Γ$ point and two BICs off the $Γ$ point. By introducing perturbations that break the out-of-plane mirror symmetry, the two off-$Γ$ BICs decompose into four circ…

Giant Spin-Orbit Torque in Cr-based Janus Transition Metal Dichalcogenides
Libor Voj\'a\v{c}ek, Joaqu\'in Medina Due\~nas, Jing Li, Fatima Ibrahim, Aur\'elien Manchon, Stephan Roche, Mairbek Chshiev, Jos\'e H. Garc\'ia
https://arxiv.org/abs/2404.15134

Giant Spin-Orbit Torque in Cr-based Janus Transition Metal Dichalcogenides
We report a very large spin-orbit torque (SOT) capability of chromium-based transition metal dichalcogenides (TMD) in their Janus forms CrXTe, with X=S,Se. The structural inversion symmetry breaking, inherent to Janus structures is responsible for a large SOT response generated by giant Rashba splitting, equivalent to that obtained by applying a transverse electric field of $\sim 100 \,\text{V} \,\text{nm}^{-1}$ in non-Janus CrTe\textsubscript{2}, completely out of experimental reach. By perfor…

Orbits, spirals, and trapped states: Dynamics of a phoretic Janus particle in a radial concentration gradient
Parvin Bayati, Stewart A. Mallory
https://arxiv.org/abs/2404.10154

Orbits, spirals, and trapped states: Dynamics of a phoretic Janus particle in a radial concentration gradient
A longstanding goal in colloidal active matter is to understand how gradients in fuel concentration influence the motion of phoretic Janus particles. Here, we present a theoretical description of the motion of a spherical phoretic Janus particle in the presence of a radial gradient of the chemical solute driving self-propulsion. Radial gradients are a geometry relevant to many scenarios in active matter systems and naturally arise due to the presence of a point source or sink of fuel. We derive…

An MBE-CASSCF Approach for the Accurate Treatment of Large Active Spaces
Jonas Greiner, Ivan Gianni, Tommaso Nottoli, Filippo Lipparini, Janus J. Eriksen, J\"urgen Gauss
https://arxiv.org/abs/2403.17836

An MBE-CASSCF Approach for the Accurate Treatment of Large Active Spaces
We present a novel implementation of the complete active space self-consistent field (CASSCF) method that makes use of the many-body expanded full configuration interaction (MBE-FCI) method to incrementally approximate electronic structures within large active spaces. On the basis of a hybrid first-order algorithm employing both Super-CI and quasi-Newton strategies for the optimization of molecular orbitals, we demonstrate both computational efficacy and high accuracy of the resulting MBE-CASSC…

Strain aided drastic reduction in lattice thermal conductivity and improved thermoelectric properties in Janus MXenes
Himanshu Murari, Swati Shaw, Subhradip Ghosh
https://arxiv.org/abs/2403.13543

Strain aided drastic reduction in lattice thermal conductivity and improved thermoelectric properties in Janus MXenes
Surface and strain engineering are among the cheaper ways to modulate structure property relations in materials. Due to their compositional flexibilities, MXenes, the family of two-dimensional materials, provide enough opportunity for surface engineering. In this work, we have explored the possibility of improving thermoelectric efficiency of MXenes through these routes. The Janus MXenes obtained by modifications of the transition metal constituents and the functional groups passivating their s…

This https://arxiv.org/abs/2312.15331 has been replaced.
initial toot: https://mastoxiv.page/@a…

Thermal transport in thermoelectric materials of SnSSe and SnS$_2$: a non-equilibrium Monte-Carlo simulation of Boltzmann transport equation
In the present work, thermal transport and energy conversation in two thermoelectrically efficient candidates of Janus SnSSe and SnS$_2$ are investigated within the non-equilibrium Monte Carlo simulation of phonon Boltzmann equation. The phonon analysis is performed to determine the contributed phonons in heat transport. The results present that the dominant participating phonons are longitudinal acoustic ones while the least belongs to the transverse acoustic (TA) mode. Both materials reached …

Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids
Gennaro Tucci, Ramin Golestanian, Suropriya Saha
https://arxiv.org/abs/2402.09279

Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids
A multicomponent mixture of Janus colloids with distinct catalytic coats and phoretic mobilities is a promising theoretical system to explore the collective behavior arising from nonreciprocal interactions. An active colloid produces (or consumes) chemicals, self-propels, drifts along chemical gradients, and rotates its intrinsic polarity to align with a gradient. As a result the connection from microscopics to continuum theories through coarse-graining couples densities and polarization fields…

The Defects Genome of 2D Janus Transition Metal Dichalcogenides
Mohammed Sayyad, Jan Kopaczek, Carmem M. Gilardoni, Weiru Chen, Yihuang Xiong, Shize Yang, Kenji Watanabe, Takashi Taniguchi, Robert Kudrawiec, Geoffroy Hautier, Mete Atature, Sefaattin Tongay
https://arxiv.org/abs/2403.06165

The Defects Genome of 2D Janus Transition Metal Dichalcogenides
Two-dimensional (2D) Janus Transition Metal Dichalcogenides (TMDs) have attracted much interest due to their exciting quantum properties arising from their unique two-faced structure, broken-mirror symmetry, and consequent colossal polarisation field within the monolayer. While efforts have been made to achieve high-quality Janus monolayers, the existing methods rely on highly energetic processes that introduce unwanted grain-boundary and point defects with still unexplored effects on the mater…

Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids
Gennaro Tucci, Ramin Golestanian, Suropriya Saha
https://arxiv.org/abs/2402.09279

Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids
A multicomponent mixture of Janus colloids with distinct catalytic coats and phoretic mobilities is a promising theoretical system to explore the collective behavior arising from nonreciprocal interactions. An active colloid produces (or consumes) chemicals, self-propels, drifts along chemical gradients, and rotates its intrinsic polarity to align with a gradient. As a result the connection from microscopics to continuum theories through coarse-graining couples densities and polarization fields…

The Defects Genome of 2D Janus Transition Metal Dichalcogenides
Mohammed Sayyad, Jan Kopaczek, Carmem M. Gilardoni, Weiru Chen, Yihuang Xiong, Shize Yang, Kenji Watanabe, Takashi Taniguchi, Robert Kudrawiec, Geoffroy Hautier, Mete Atature, Sefaattin Tongay
https://arxiv.org/abs/2403.06165

The Defects Genome of 2D Janus Transition Metal Dichalcogenides
Two-dimensional (2D) Janus Transition Metal Dichalcogenides (TMDs) have attracted much interest due to their exciting quantum properties arising from their unique two-faced structure, broken-mirror symmetry, and consequent colossal polarisation field within the monolayer. While efforts have been made to achieve high-quality Janus monolayers, the existing methods rely on highly energetic processes that introduce unwanted grain-boundary and point defects with still unexplored effects on the mater…

Single-Spin Waved-Brim Flat-Top Hat in the Band Edge of GdIH Monolayer
Ningning Jia, Zhao Yang, Jiangtao Cai, Zhiheng Lv, Yongting Shi, Tielei Song, Xin Cui, Zhifeng Liu
https://arxiv.org/abs/2404.15007

Single-Spin Waved-Brim Flat-Top Hat in the Band Edge of GdIH Monolayer
Exotic electronic bands, such as flat bands, linear crossing bands, spontaneously valley- or spin-polarized bands, in two-dimensional materials have been the hot topics in condensed matter physics. Herein, we first propose a general dispersion model for possible hat-like electronic bands, and then identify an intriguing single-spin \emph{waved-brim flat-top hat} in the valence band edge of a stable ferromagnetic semiconducting electrene (i.e., Janus GdIH monolayer), which can be well described …

Shape changes of a single hairy particle with mobile ligands at a liquid-liquid interface
T. Staszewski, M. Bor\'owko
https://arxiv.org/abs/2403.14823 …

Shape changes of a single hairy particle with mobile ligands at a liquid-liquid interface
We investigate rearrangements of a single hairy particle at a liquid-liquid interface using coarse-grained molecular dynamics simulations. We consider the particles with the same (symmetrical interactions) and different (asymmetrical interactions) affinity to the liquids. We show how ligand mobility affects the behavior of the hairy particle at the liquid-liquid interface. We found that such a hairy particle can take various shapes at the interface. For example, a Janus-like snowman consisting …

Traveling strings of active dipolar colloids
Xichen Chao, Katherine Skipper, C. Patrick Royall, Silke Henkes, Tanniemola B. Liverpool
https://arxiv.org/abs/2404.12218

Traveling strings of active dipolar colloids
We study an intriguing new type of self-assembled active colloidal polymer system in 3D. It is obtained from a suspension of Janus particles in an electric field that induces parallel dipoles in the particles as well as self-propulsion in the plane perpendicular to the field. At low packing fractions, in experiment, the particles self-assemble into 3D columns that are self-propelled in 2D. Explicit numerical simulations combining dipolar interactions and active self-propulsion find an activity …

Traveling strings of active dipolar colloids
Xichen Chao, Katherine Skipper, C. Patrick Royall, Silke Henkes, Tanniemola B. Liverpool
https://arxiv.org/abs/2404.12218

Traveling strings of active dipolar colloids
We study an intriguing new type of self-assembled active colloidal polymer system in 3D. It is obtained from a suspension of Janus particles in an electric field that induces parallel dipoles in the particles as well as self-propulsion in the plane perpendicular to the field. At low packing fractions, in experiment, the particles self-assemble into 3D columns that are self-propelled in 2D. Explicit numerical simulations combining dipolar interactions and active self-propulsion find an activity …

This https://arxiv.org/abs/2307.11839 has been replaced.
initial toot: https://mastoxiv.page/@a…

First-principles Calculations of MoSeTe/WSeTe Bilayers: Stability, Phonons, Electronic Band Offsets, and Rashba Splitting
Janus materials have attracted much interest due to their intrinsic electric dipole moment and Rashba band splitting. We show that, by building bilayers of MoSeTe and WSeTe with different chalcogen atom sequences and different stacking patterns, one can modulate the net dipole moment strength and the Rashba effect, as well as the band alignment of the MoSeTe/WSeTe bilayer. Type-II band alignment is found which can be exploited to create long-lived interlayer excitons. Moreover, it is shown that…

This https://arxiv.org/abs/2311.15638 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Motility-induced coexistence of a hot liquid and a cold gas
If two phases exist at the same time, such as a gas and a liquid, they have the same temperature. This fundamental law of equilibrium physics is known to apply even to many non-equilibrium systems. However, recently, there has been much attention in the finding that inertial self-propelled particles like Janus colloids in a plasma or microflyers could self-organize into a hot gas-like phase that coexists with a colder liquid-like phase. Here, we show that a kinetic temperature difference across…

Autonomous Engulfment of Active Colloids by Giant Lipid Vesicles
Florent Fessler, Martin Wittman, Juliane Simmchen, Antonio Stocco
https://arxiv.org/abs/2403.10234

Autonomous Engulfment of Active Colloids by Giant Lipid Vesicles
The ability to design artificial micro/nanomachines able to perform sophisticated tasks crucially depends on the understanding of their interaction with biosystems and their compatibility with the biological environment. Here, Janus colloids fuelled only by glucose and light were designed, which can autonomously interact with cell-like compartments and trigger endocytosis. The crucial role played by the far field hydrodynamic interaction arising from the puller/pusher swimming mode and adhesion…

Machine Learning Assisted Sorting of Active Microswimmers
Abdolhalim Torrik, Mahdi Zarif
https://arxiv.org/abs/2404.08275 https://arx…

Machine Learning Assisted Sorting of Active Microswimmers
Active matter systems being in a non-equilibrium state, exhibit complex behaviors such as self-organization and giving rise to emergent phenomena. There are many examples of active particles with biological origins, including bacteria and spermatozoa, or with artificial origins, such as self-propelled swimmers and Janus particles. The ability to manipulate active particles is vital for their effective application e.g. separating motile spermatozoa from nonmotile and dead ones, to increase ferti…