Tootfinder

A #periodicreminder that "prediction is hard, especially about the future."
(And that extrapolation is risky in the innovation zone.)
https://brianiseli…

Counter-propagating spontaneous parametric down-conversion source in lithium niobate on insulator
Jost Kellner, Alessandra Sabatti, Tristan Kuttner, Robert J. Chapman, Rachel Grange
https://arxiv.org/abs/2506.21396

Counter-propagating spontaneous parametric down-conversion source in lithium niobate on insulator
Quantum photonic technologies rely on the ability to generate, manipulate, and interfere indistinguishable single photons on a scalable platform. Among the various approaches, spontaneous parametric down-conversion (SPDC) remains one of the most widely used methods for generating entangled or pure photon pairs. However most integrated SPDC sources relying on co-propagating geometries have a limited purity of heralded photons, or require lossy filtering. Type-2 SPDC processes can produce pure se…

The ESPRESSO transmission spectrum of HD$\,$189733$\,$b : Extracting the planetary sodium and lithium signatures amid stellar contamination
D. Mounzer, W. Dethier, C. Lovis, V. Bourrier, A. Psaridi, H. Chakraborty, M. Lendl, R. Allart, J. V. Seidel, M. R. Zapatero Osorio, P. Molaro, M. Steiner, D. Ehrenreich, Y. Alibert, I. Carleo, S. Cristiani, J. I. Gonz\'alez Hern\'andez, C. J. A. P. Martins, E. Palle, J. Rodrigues, N. Santos, A. Sozzetti, A. Su\'arez Mascare\~no

The ESPRESSO transmission spectrum of HD$\,$189733$\,$b : Extracting the planetary sodium and lithium signatures amid stellar contamination
While transmission spectroscopy has allowed us to detect many atomic and molecular species in exoplanet atmospheres, the improvement in resolution and signal-to-noise ratio enabled us to become sensitive to planet-occulted line distortions (POLDs) in the spectrum that are induced by center-to-limb variations and the Rossiter-McLaughlin effect. POLDs can bias the interpretation of the transmission spectrum, and it is difficult to correct for them with stellar models. We analyzed two ESPRESSO tra…

Lithium-Ionen-Batterien 19x länger benutzen
https://stohl.de/wordpress/?p=191177

The mixing of internal gravity waves and lithium production in intermediate-mass AGB stars
Zhijun Wang, Guoliang L\"u, Chunhua Zhu, Sufen Guo, Helei Liu, Xizhen Lu
https://arxiv.org/abs/2506.20360

The mixing of internal gravity waves and lithium production in intermediate-mass AGB stars
Context: Intermediate-mass asymptotic giant branch (AGB) stars influence Galactic lithium evolution by ejecting surface material (including Li) via stellar winds. Internal gravity waves (IGW), excited by convective motions, drive turbulent mixing in non-convective regions, altering stellar surface and wind chemistry. Aims: Investigate IGW-induced extra-mixing in the radiative zone between thermal pulses and convective envelopes of AGB stars and its impact on Li production. Derive the total Li c…

High mechanical strength Si anode synthesis with interlayer bonded expanded graphite structure for lithium-ion batteries
Wenhui Lai, Jong Hak Lee, Lu Shi, Yuqing Liu, Yanhui Pu, Yong Kang Ong, Carlos Limpo, Ting Xiong, Yifan Rao, Chorng Haur Sow, Barbaros \"Ozyilmaz
https://arxiv.org/abs/2506.20189

High mechanical strength Si anode synthesis with interlayer bonded expanded graphite structure for lithium-ion batteries
Despite advancements in silicon-based anodes for high-capacity lithium-ion batteries, their widespread commercial adoption is still hindered by significant volume expansion during cycling, especially at high active mass loadings crucial for practical use. The root of these challenges lies in the mechanical instability of the material, which subsequently leads to the structural failure of the electrode. Here, we present a novel synthesis of a composite combining expanded graphite and silicon nan…

The discovery of a massive amount of lithium under the Salton Sea could make the U.S. lithium independent.
The metal is key for batteries in electric vehicles and solar panels.
But the area is also a delicate ecosystem.
We go to southern California to hear what hangs in the balance of the ballooning lithium industry,
and also how we extract other crucial substances  
– such as sand, copper and iron
– and turn them into semiconductors, circuitry and other …

Extractivism comes back to Europe as mineral demands are set to rocket.
The only way is to use far less energy.
#degrowth
Europe’s lithium rush leaves mineral-rich communities in the dark

Europe’s lithium rush leaves mineral-rich communities in the dark
Some local residents say they haven't been adequately consulted before the rollout of Europe's lithium plans and fear for their incomes

Observation of Enhanced Core Impurity Transport in a Turbulence-Reduced Stellarator Plasma
Daniel Medina-Roque, Isabel Garc\'ia-Cort\'es, Naoki Tamura, Kieran J. McCarthy, Federico Nespoli, Kenji Tanaka, Mamoru Shoji, Suguru Masuzaki, Hisamichi Funaba, Chihiro Suzuki, Albert Mollen, Robert Lunsford, Katsumi Ida, Mikiro Yoshinuma, Motoshi Goto, Yasuko Kawamoto, Tomoko Kawate, Tokihiko Tokuzawa, Ichihiro Yamada

Observation of Enhanced Core Impurity Transport in a Turbulence-Reduced Stellarator Plasma
An enhancement of core impurity transport is observed for the first time in a high-density stellarator plasma with continuous lithium (Li) granule injection. When Li-granules are dropped continuously into the plasma, energy confinement is improved due to reduced turbulence. In parallel, the transport of mid- and high-Z impurities is increased. Simulations with the drift-kinetic transport code SFINCS for such plasmas show that the role of neoclassical transport prevails for the main plasma compo…

Scalable quantum interference in integrated lithium niobate nanophotonics
Tristan Kuttner, Alessandra Sabatti, Jost Kellner, Rachel Grange, Robert J. Chapman
https://arxiv.org/abs/2506.20519

Scalable quantum interference in integrated lithium niobate nanophotonics
Photonics has emerged as one of the leading platforms for the implementation of real-world-applicable quantum technologies, enabling secure communication, enhanced sensing capabilities, as well as resolving previously intractable computational challenges. However, to harness the full potential of the photonics platform, several engineering feats need to be accomplished, among those is the quest for a scalable source of pure single photons. While single photon sources can be implemented in a var…

Der weltweite #Boom bei #Elektroautos könnte in wenigen Jahren wegen eines drohenden #Lithium-Engpasses ins Stocken geraten.
Eine neue Studie zeigt, dass der Bedarf in den

Electric vehicle boom could hit major roadblock in just 5 years, study claims | BBC Science Focus Magazine
With sales skyrocketing, a shortage of this key critical material could halt progress

Forscher entwickeln Natrium-Brennstoffzelle für Elektromobilität
Forschende am MIT haben eine Natrium-Brennstoffzelle entwickelt, die eine Alternative zu Lithium-Ionen-Akkus und Wasserstoff-Brennstoffzellen darstellen könnte.

"EV battery recycling key to easing future lithium supply constraints, modeling study shows"
#EV #ElectricVehicle #Cars

EV battery recycling key to easing future lithium supply constraints, modeling study shows
Lightweight, powerful lithium-ion batteries are crucial for the transition to electric vehicles, and global demand for lithium is set to grow rapidly over the next 25 years. A new analysis from the University of California, Davis, published May 29 in Nature Sustainability, looks at how new mining operations and battery recycling could meet that demand. Recycling could play a big role in easing supply constraints, the researchers found.

Optimal Design of Experiment for Electrochemical Parameter Identification of Li-ion Battery via Deep Reinforcement Learning
Mehmet Fatih Ozkan, Samuel Filgueira da Silva, Faissal El Idrissi, Prashanth Ramesh, Marcello Canova
https://arxiv.org/abs/2506.19146

Optimal Design of Experiment for Electrochemical Parameter Identification of Li-ion Battery via Deep Reinforcement Learning
Accurate parameter estimation in electrochemical battery models is essential for monitoring and assessing the performance of lithium-ion batteries (LiBs). This paper presents a novel approach that combines deep reinforcement learning (DRL) with an optimal experimental design (OED) framework to identify key electrochemical parameters of LiB cell models. The proposed method utilizes the twin delayed deep deterministic policy gradient (TD3) algorithm to optimize input excitation, thereby increasin…

Assessing Waste Heat Utilization in Power-to-Heat-to-Power Storage Systems for Cost-Effective Building Electrification
Alicia L\'opez-Ceballos, Alejandro Datas
https://arxiv.org/abs/2506.19403

Assessing Waste Heat Utilization in Power-to-Heat-to-Power Storage Systems for Cost-Effective Building Electrification
Fully electrifying the building sector requires not only the widespread adoption of photovoltaic (PV) self-consumption and heat pumps, but also the integration of cost-effective energy storage solutions. Hybridizing lithium-ion (Li-ion) batteries with power to heat to power storage (PHPS) systems, thermal batteries capable of thermal-to-electric energy conversion, offers a promising and economically viable solution. PHPS systems dispatch combined heat and power by utilizing the low-temperature …

Direct Observation of Hot Spots in Ferroelectric Domain Wall Devices by Scanning Thermal Microscopy
Lindsey R. Lynch, J. Marty Gregg, Amit Kumar, Kristina M. Holsgrove, Raymond G. P. McQuaid
https://arxiv.org/abs/2506.20591

Direct Observation of Hot Spots in Ferroelectric Domain Wall Devices by Scanning Thermal Microscopy
Ferroelectric domain wall devices offer a promising route to low voltage, reconfigurable nanoelectronics by confining currents to nanoscale conducting interfaces within an insulating bulk. However, resistive heating due to domain wall conduction still remains unexplored. Here, we employ scanning thermal microscopy to directly image hot spots in thin-film lithium niobate domain wall devices. Piezoresponse force microscopy shows that the hot spots correlate with nanodomain structure and thermal m…

Ultra-broadband spectral and polarisation entanglement using dispersion-engineered nanophotonic waveguides
Mahmoud Almassri, Mohammed F. Saleh
https://arxiv.org/abs/2506.17819

Ultra-broadband spectral and polarisation entanglement using dispersion-engineered nanophotonic waveguides
In this paper, we propose exploiting dispersion-engineered nanophotonic waveguides in generating unprecedented ultra-broadband spectral and polarisation entanglement using spontaneous four-wave mixing parametric processes. We developed a simplified theoretical quantum framework to investigate and analyse these interactions under pulse source excitations. Using aluminum gallium arsenide and thin-film lithium niobate waveguides, we anticipate to obtain photon pairs with high-dimensional frequency…

A Model-Free Detection Method for Internal Short Circuits in Single Lithium-ion Cells Using Pseudo Open-Circuit Voltage Difference
Yangyang Xu, Chenglin Liao
https://arxiv.org/abs/2506.13394

A Model-Free Detection Method for Internal Short Circuits in Single Lithium-ion Cells Using Pseudo Open-Circuit Voltage Difference
This letter proposes a lightweight, model-free online diagnostic framework for detecting internal short circuits (ISC) in single lithium-ion cells under dynamic operating conditions. The core of the method lies in computing the first-order difference of pseudo open-circuit voltage ($\boldsymbol{\mathrm{OCV}_{\text{pseudo}}}$) to extract high-frequency deviations caused by ISC events from low-frequency polarization variations. The method relies solely on terminal voltage, current measurements, a…

Detailed Chemical Abundance Analysis of Metal-Poor Turn-Off Stars: One with [Fe/H] < -4 and Three with [Fe/H] < -4
Takuma Suda, Patrick Francois, Shinya Wanajo, Elisabetta Caffau, Wako Aoki, Piercarlo Bonifacio
https://arxiv.org/abs/2506.18286

Detailed Chemical Abundance Analysis of Metal-Poor Turn-Off Stars: One with [Fe/H] < -4 and Three with [Fe/H] < -4
We present the analysis of four new extremely metal poor turn-off stars thanks to high-resolution spectra obtained with the Subaru/HDS spectrograph. We determined the abundances and upper limits of Li, C, Mg, Ca, Sr, and Ba. Metallicities range from [Fe/H] = -3.3 to -4.4 dex. For one of the stars, we measure the lithium abundance Log(Li/H) = 2.1 {\pm} 0.2. Two stars of the sample have low [α/Fe] abundances. The most metal-poor star of the sample with [Fe/H] = -4.42 dex has a high [Sr/Fe] abund…

Bridging Electrostatic Screening and Ion Transport in Lithium Salt-Doped Ionic Liquids
Hyungshick Park, Bong June Sung, Jeongmin Kim
https://arxiv.org/abs/2506.08476

Bridging Electrostatic Screening and Ion Transport in Lithium Salt-Doped Ionic Liquids
Alkali salt-doped ionic liquids are emerging as promising electrolyte systems for energy applications, owing to their excellent interfacial stability. To address their limited ionic conductivity, various strategies have been proposed, including modifying the ion solvation environment and enhancing the transport of selected ions (e.g., Li$^+$). Despite the pivotal role of electrostatic interactions in determining key physicochemical properties, their influence on ion transport in such systems ha…

Rotating Quantum Droplets in Low Dimensions
Kevin Hern\'andez, El\'ias Castellanos
https://arxiv.org/abs/2506.16719 https://a…

Rotating Quantum Droplets in Low Dimensions
Quantum droplets formed by rubidium, lithium, and sodium atoms have been analyzed in this paper by using a logarithmic-type Gross-Pitaevskii equation. Variational methods and numerical techniques were employed to solve the corresponding nonlinear equations. A disk-shaped Bose-Einstein condensate was analyzed to assess its radial evolution. Additionally, free expansion under rotation of the BEC was studied. Compression and expansion around the equilibrium radius were observed in different scenar…

A mesoscale phase-field model of intergranular liquid lithium corrosion of ferritic/martensitic steels
A. Lhoest, S. Kovacevic, D. Nguyen-Manh, J. Lim, E. Mart\'inez-Pa\~neda, M. Wenman
https://arxiv.org/abs/2506.02776

A mesoscale phase-field model of intergranular liquid lithium corrosion of ferritic/martensitic steels
A phase-field model is developed to simulate intergranular corrosion of ferritic/martensitic steels exposed to liquid lithium. The chromium concentration of the material is used to track the mass transport within the metal and liquid (corrosive) phase. The framework naturally captures intergranular corrosion by enhancing the diffusion of chromium along grain boundaries relative to the grain bulk with no special treatment for the corrosion front evolution. The formulation applies to arbitrary 2D…

Looks like they are doing organized deliberate demolition of robotaxis in #dtla. They have a line of 3 lit.
The voice on #CNN isn’t wrong: when people see images of lawlessness (I.e. roaring Lithium ion battery fires) they lose their minds. Never mind that these are essentially victimless acts of arson, with…

BattBee: Equivalent Circuit Modeling and Early Detection of Thermal Runaway Triggered by Internal Short Circuits for Lithium-Ion Batteries
Sangwon Kang, Hao Tu, Huazhen Fang
https://arxiv.org/abs/2506.13577

BattBee: Equivalent Circuit Modeling and Early Detection of Thermal Runaway Triggered by Internal Short Circuits for Lithium-Ion Batteries
Lithium-ion batteries are the enabling power source for transportation electrification. However, in real-world applications, they remain vulnerable to internal short circuits (ISCs) and the consequential risk of thermal runaway (TR). Toward addressing the challenge of ISCs and TR, we undertake a systematic study that extends from dynamic modeling to fault detection in this paper. First, we develop {\em BattBee}, the first equivalent circuit model to specifically describe the onset of ISCs and t…

Integrated phononic waveguide on thin-film lithium niobate on diamond
Sultan Malik, Felix M. Mayor, Wentao Jiang, Hyunseok Oh, Carl Padgett, Viraj Dharod, Jayameenakshi Venkatraman, Ania C. Bleszynski Jayich, Amir H. Safavi-Naeini
https://arxiv.org/abs/2505.23100

Integrated phononic waveguide on thin-film lithium niobate on diamond
We demonstrate wavelength-scale phononic waveguides formed by transfer-printed thin-film lithium niobate (LN) on bulk diamond (LNOD), a material stack that combines the strong piezoelectricity of LN with the high acoustic velocity and color-center compatibility of diamond. We characterize a delay line based on a 100 micron long phononic waveguide at room and cryogenic temperatures. The total insertion loss through the device at 4 kelvin is -5.8 dB, corresponding to a >50% transducer efficiency,…

Visible Brillouin-quadratic microlaser in a high-Q thin-film lithium niobate microdisk
Xiaochao Luo, Chuntao Li, Xingzhao Huang, Jintian Lin, Renhong Gao, Yifei Yao, Yingnuo Qiu, Yixuan Yang, Lei Wang, Huakang Yu, Ya Cheng
https://arxiv.org/abs/2506.08615

Visible Brillouin-quadratic microlaser in a high-Q thin-film lithium niobate microdisk
Narrow-linewidth lasers at short/visible wavelengths are crucial for quantum and atomic applications, such as atomic clocks, quantum computing, atomic and molecular spectroscopy, and quantum sensing. However, such lasers are often only accessible in bulky tabletop systems and remain scarce in integrated photonic platform. Here, we report an on-chip visible Brillouin-quadratic microlaser in a 117-um-diameter thin-film lithium niobate (TFLN) microdisk via dispersion engineering. Enabled by the ul…

Creation of a degenerate Bose-Bose mixture of erbium and lithium atoms
Jasmine Kalia, Jared Rivera, Rubaiya R Emran, William J Solorio Hernandez, Kiryang Kwon, Richard J Fletcher
https://arxiv.org/abs/2506.00177

Creation of a degenerate Bose-Bose mixture of erbium and lithium atoms
We report the realization of a degenerate mixture of $^{166}$Er and $^{7}$Li atoms in their lowest spin state. The two species are sequentially laser-cooled and loaded into an optical dipole trap, then transported to a glass cell in which further cooling to degeneracy occurs. Since Er is more weakly trapped, it serves as a coolant for Li, and we observe efficient sympathetic cooling facilitated by a large interspecies elastic scattering cross section. Three-body losses are found to be small at …

This https://arxiv.org/abs/2412.20991 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nli…

Topological gap solitons in equidistant lithium niobate waveguide arrays
Equidistant 1D arrays of thin film lithium niobate waveguides can exhibit non-trivial topology due to a specific interplay between inter- and intra-modal couplings of two families of guided modes. In this work we analyze two-colour spatial solitons, emerging due to $χ_2$ nonlinear interactions between the modes of non-trivial topology in the fundamental harmonic field, and modes of trivial topology in the second harmonic field. We discuss solitons localized in the bulk of the array (bulk solit…

This https://arxiv.org/abs/2502.08915 has been replaced.
initial toot: https://mastoxiv.page/@a…

Metal-to-superconductor Transition Induced by Lithium Adsorption on Monolayer 1$T$-Nb$_2$C
Recently, two-dimensional Nb$_2$C has garnered increasing attention due to its functional-group-dependent superconductivity, both experimentally and theoretically. In contrast to the halogen and chalcogen additives that have been the main focus of previous studies, we study the effect of lithium adsorption, which can also be incorporated during the synthesis of Nb$_2$C. Our computational analysis reveals a metal-to-superconductor transition in monolayer Nb$_2$C with a critical temperature ($T_{…

Stringent Constraints on New Pseudoscalars from Precision Hyperfine Splitting Measurements
Cedric Quint, Fabian Hei{\ss}e, Joerg Jaeckel, Lutz Leimenstoll, Christoph H. Keitel, Zolt\'an Harman
https://arxiv.org/abs/2506.03274

Stringent Constraints on New Pseudoscalars from Precision Hyperfine Splitting Measurements
Axion-like particles and similar new pseudoscalar bosons coupled to nucleons and electrons are predicted to lead to spin-dependent forces in atoms and ions. We argue that hyperfine structure measurements in the hydrogen- and lithium-like charge states are a sensitive probe to this effect. Employing specific differences of these splittings reduces uncertainties due to nuclear effects in hyperfine structure calculations and measurements. Using this, we show that existing measurements on Be provid…

Aluminum oxide coatings on Co-rich cathodes and interactions with organic electrolyte
M. D. Hashan C. Peiris, Michael Woodcox, Diana Liepinya, Robert Shephard, Hao Liu, Manuel Smeu
https://arxiv.org/abs/2506.09252

Aluminum oxide coatings on Co-rich cathodes and interactions with organic electrolyte
Lithium-ion batteries (LIBs) have become essential in modern energy storage; however, their performance is often limited by the stability and efficiency of their components, particularly the cathode and electrolyte. Transition metal layered oxide cathodes, a popular choice for lithium-ion batteries (LIBs), suffer from several degradation mechanisms, including capacity fading, reactions with the electrolyte, unstable cathode-electrolyte interfaces, and lattice breakdown during cycling. In recent…

Laterally Excited Bulk Acoustic Wave (LBAW) X-Cut Lithium Niobate Resonators
Walter Gubinelli, Ryan Tetro, Pietro Simeoni, Luca Colombo, Matteo Rinaldi
https://arxiv.org/abs/2506.04433

Laterally Excited Bulk Acoustic Wave (LBAW) X-Cut Lithium Niobate Resonators
In this work, Laterally excited Bulk Acoustic Wave (LBAW) resonators on X-cut Lithium Niobate (LiNbO3) and, for the first time their higher-order overtones (LOBAW) are demonstrated by embedding interdigitated electrodes recessed into the piezoelectric thin film, allowing to exploit both S0 and SH0 vibrational modes. This recessed electrode architecture decouples the dispersion relation from film thickness, enabling lithographic tuning of resonance frequency and on-chip multi-frequency scaling o…

Versatile Lithium Niobate Platform for Photoacoustic/Thermoelastic Gas Sensing and Photodetection
Haoyang Lin, Wenguo Zhu, Yongchun Zhong, Huihui Lu, Jianhui Yu, Huadan Zheng
https://arxiv.org/abs/2505.24276

Versatile Lithium Niobate Platform for Photoacoustic/Thermoelastic Gas Sensing and Photodetection
We present a lithium niobate multi-functional platform (LN-MFP) that integrates photoacoustic and thermoelastic spectroscopy with photodetection on a single chip. Utilizing LN's piezoelectric and thermoelastic properties and an optimized design, it achieves high sensitivity across visible to long-wave infrared wavelengths. We demonstrate photoacoustic/thermoelastic gas sensing and photodetection using LN-MFP. The compact, integrated system with custom packaging and direct wire bonding reduces c…

Replaced article(s) found for physics.app-ph. https://arxiv.org/list/physics.app-ph/new/
[1/1]:
Low Temperature Properties of Low-Loss Macroscopic Lithium Niobate Bulk Acoustic Wave Resonators

Testing inter-electronic interaction in lithium-like tin
Jonathan Morgner (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany), Vladimir A. Yerokhin (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany), Charlotte M. Konig (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany), Fabian Hei{\ss}e (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany), Bingsheng Tu (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany), Tim Sailer (Max-…

This https://arxiv.org/abs/2505.16779 has been replaced.
initial toot: https://mastoxiv.page/@a…

Phase engineering of MoS$_2$ monolayers: A pathway to enhanced lithium-polysulfide battery performance
This study explores the potential of MoS$_2$ polymorphs, specifically the semiconducting 2H phase and the metallic 1T$^\prime$ phase, as anchoring materials to enhance the electrochemical performance of lithium-sulfur (Li--S) batteries. Using density functional theory calculations, we show that 1T$^\prime$-MoS$_2$ exhibits stronger Li--S interactions, greater charge transfer, and enhanced catalytic activity compared to its 2H counterpart, effectively suppressing polysulfide dissolution and faci…

Low-loss, fabrication-tolerant, and highly-tunable Sagnac loop reflectors and Fabry-P\'erot cavities on thin-film lithium niobate
Luke Qi, Ali Khalatpour, Jason Herrmann, Taewon Park, Devin Dean, Sam Robison, Alexander Hwang, Hubert Stokowski, Darwin Serkland, Martin Fejer, Amir H. Safavi-Naeini
https://arxiv.org/abs/2505.23…

Low-loss, fabrication-tolerant, and highly-tunable Sagnac loop reflectors and Fabry-Pérot cavities on thin-film lithium niobate
We present low-loss ($<1.5\%$) and power-efficient Mach-Zehnder interferometers (MZIs) on thin-film lithium niobate. To accurately measure low MZI losses, we develop a self-calibrated method using tunable Sagnac loop reflectors (SLRs) to build cavities. Fabry-Pérot cavities constructed from these fabrication-tolerant SLRs achieve an intrinsic quality factor of $2 \times 10^6$. By implementing thermal isolation trenches, we also demonstrate a $>10\times$ reduction in power consumption for therm…

Alkali phenoxides in comets
M. Fulle, P. Molaro, A. Rotundi, L. Tonietti, A. Aletti, L. Buzzi, P. Valisa
https://arxiv.org/abs/2506.02343 https://

Alkali phenoxides in comets
Potassium was first detected in spectra of the sungrazer comet Ikeya-Seki at the heliocentric distance rh = 0.15 au and, 48 years later, in comets PanSTARRS and ISON at rh = 0.46 au. The alkali tail photoionization model provides a Na/K ratio close to the solar value. No lithium was detected in any comet: the lower limit of the Na/Li ratio was almost one order of magnitude greater than the solar ratio. Here we searched for the emissions of the alkali NaI, KI, and LiI in Comets C/2020 F3 and C/2…

Mechanism and Stability of Li-Dynamics in Amorphous Li-Ti-P-S Based Mixed Ionic-Electronic Conductor
Selva Chandrasekaran Selvaraj, Daiwei Wang, Donghai Wang, Anh T. Ngo
https://arxiv.org/abs/2506.11199

Mechanism and Stability of Li-Dynamics in Amorphous Li-Ti-P-S Based Mixed Ionic-Electronic Conductor
Mixed ionic-electronic conductor (MIEC) exhibit both high ionic and electronic conductivity to improve the battery performance. In this work, we investigate the mechanism and stability of transport channels in recently developed our MIEC material, amorphous Ti-doped lithium phosphorus sulfide (LPS), using molecular dynamics (MD) simulations with a 99\% accurate machine-learning force field (MLFF) trained on \textit{ab-initio} MD data. The achieved MLFF helps efficient large-scale MD simulations…

Integrated thin film lithium niobate mid-infrared modulator
Pierre Didier, Prakhar Jain, Mathieu Bertrand, Jost Kellner, Oliver Pitz, Zhecheng Dai, Mathias Beck, Baile Chen, Jerome Faist, Rachel Grange
https://arxiv.org/abs/2505.23632

Integrated thin film lithium niobate mid-infrared modulator
The mid-infrared spectral range holds great promise for applications such as molecular spectroscopy and telecommunications. Many key molecules exhibit strong absorption features in this range, and free-space optical communication benefits from reduced atmospheric attenuation and low transmission losses in specific wavelength bands spanning from 3 to 14 μm. Recent progress in MIR photonics has been fuelled by the rapid development of efficient light sources and detectors. However, further advan…

Revisiting the Li abundances of Stars with and without Detected Planets from the High Resolution Spectroscopy
Jinxiao Qin, Hong-Liang Yan, Wenyuan Cui, Jian-Rong Shi, Subo Dong, Shuai Liu, Zeming Zhou, Miao Tian, Zhenyan Huo, Xiangsong Fang, Jinghua Zhang, Chunqian Li, Mingyi Ding, Song Wang, Henggeng Han
https://arxiv.org/abs/2…

Revisiting the Li abundances of Stars with and without Detected Planets from the High Resolution Spectroscopy
Whether the presence of planets affects the lithium (Li) abundance of their host stars is still an open question. To investigate the difference of the Li abundance between planet-host stars (HS) and isolated stars (IS) with no detected planets, we analyze a large sample of stars with temperatures ranging from 4600 to 6600 K and metallicity ranging from -0.55 to +0.50. The sample consists of 279 HS whose spectra were taken from the California-Kepler Survey (CKS), which followed up planets detect…

Meta-analysis of Life Cycle Assessments for Li-Ion Batteries Production Emissions
Maurizio Clemente, Prapti Maharjan, Mauro Salazar, Theo Hofman
https://arxiv.org/abs/2506.05531

Meta-analysis of Life Cycle Assessments for Li-Ion Batteries Production Emissions
This paper investigates the environmental impact of Li-Ion batteries by quantifying manufacturing-related emissions and analyzing how electricity mix and production scale affect emission intensity. To this end, we conduct a meta-analysis of life cycle assessments on lithium-ion batteries published over the past two decades, categorizing them by year, battery chemistry, functional unit, system boundaries, and electricity mix. We then carry out a cradle-to-gate assessment for a nickel manganese c…

This https://arxiv.org/abs/2505.23632 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Integrated thin film lithium niobate mid-infrared modulator
The mid-infrared spectral range holds great promise for applications such as molecular spectroscopy and telecommunications. Many key molecules exhibit strong absorption features in this range, and free-space optical communication benefits from reduced atmospheric attenuation and low transmission losses in specific wavelength bands spanning from 3 to 14 μm. Recent progress in MIR photonics has been fuelled by the rapid development of efficient light sources and detectors. However, further advan…

This https://arxiv.org/abs/2411.17443 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Electro-optically tunable Brillouin microlasers on lithium niobate platform
Miniature, monolithic, tunable sources of coherent radiation with narrow linewidths and low noise are highly sought after for photonic integration. Brillouin lasers, known for their intrinsically narrow linewidths, present an appealing solution. However, achieving the strong optomechanical coupling necessary for lasing in optical microresonators remains challenging due to the difficulty of simultaneously confining optical and acoustic modes with substantial modal overlap. Additionally, most Bri…