🔬 Category

cond-mat.mtrl-sci

503 papers

Frustrated supermolecules: the high-pressure phases of crystalline methane

Using molecular dynamics based on density functional theory, this study reveals that the complex high-pressure crystal phases of methane arise from the packing of specific supermolecular clusters (icosahedral and polyhedral) where a trade-off between efficient packing and suppressed rotational entropy, driven by orientation-dependent intermolecular interactions, explains the observed non-cubic symmetries and sluggish phase transitions.

Marcin Kirsz, Miguel Martinez-Canales, Ayobami D. Daramola, John S. Loveday, Ciprian G. Pruteanu, Graeme J AcklandMon, 09 Ma🔬 cond-mat.mtrl-sci

Unlocking extreme doping and strain in epitaxial monocrystalline silicon

This paper demonstrates that nanosecond laser doping of epitaxial boron-doped silicon achieves record-breaking carrier concentrations and lattice deformations, with the observed hyperdoping limits quantitatively explained by a combinatorial model showing that inactive dopant complexes form when neighboring substitutional sites are occupied.

Léonard Desvignes, Dominique Débarre, Ludovic Largeau, Géraldine Hallais, Gilles Patriarche, Giacomo Priante, Eric Ngo, Olivia Mauguin, Alberto Debernardi, Bernard Sermage, Francesca ChiodiMon, 09 Ma🔬 cond-mat.mtrl-sci

Understanding the anisotropic response of β\beta-Ga2_2O3_3 to ion implantation

This study combines X-ray diffraction experiments and molecular dynamics simulations to reveal the anisotropic strain-stress dynamics and orientation-independent phase transitions in β\beta-Ga2_2O3_3 induced by ion implantation, establishing a framework to link macroscopic diffraction data with atomistic models for engineering material properties.

Duarte Magalhães Esteves, Ru He, Sérgio Magalhães, Miguel Carvalho Sequeira, Ângelo Rafael Granadeiro da Costa, Julia Zanoni, Joana Rodrigues, Teresa Monteiro, Flyura Djurabekova, Katharina Lorenz, Marco PeresMon, 09 Ma🔬 cond-mat.mes-hall

Giant orbital magnetoresistance in the antiferromagnet CoO driven by dynamic orbital angular momentum interaction

This paper demonstrates a fifty-fold enhancement in orbital Hall magnetoresistance in CoO/Cu* heterostructures driven by a unique interaction between dynamic orbital currents from oxidized copper and the static orbital angular momentum of the antiferromagnet CoO, offering a pathway to highly efficient orbitronic devices.

Christin Schmitt, Sachin Krishnia, Edgar Galindez-Ruales, Luca Micus, Takashi Kikkawa, Hiroki Arisawa, Marjana Lezaic, Duc Tran, Timo Kuschel, Jairo Sinova, Eiji Saitoh, Gerhard Jakob, Olena Gomonay, Yuriy Mokrousov, Mathias KläuiMon, 09 Ma🔬 cond-mat.mtrl-sci

Revisiting the symmetry and optical phonons of altermagnetic α\alpha-MnTe

By combining high-resolution spectroscopy with ab initio calculations, this study resolves controversies surrounding α\alpha-MnTe by identifying previously misattributed Raman modes as artifacts of a secondary MnTe2_2 phase, thereby establishing the material's intrinsic optical phonon frequencies and confirming the preservation of its 6-fold rotation and inversion symmetries.

Ece Uykur, Marcos V. Gonçalves-Faria, Sahana Rößler, Victoria A. Ginga, Marcus Schmidt, Stephan Winnerl, Manfred Helm, Alexander A. TsirlinMon, 09 Ma🔬 cond-mat.mtrl-sci

Structural Commonalities in Different Classes of Non-Crystalline Materials

This study investigates structural commonalities and differences among non-crystalline materials by analyzing Pair Distribution Functions, revealing that amorphous semiconductors exhibit similar network-forming patterns with near-zero values between their first and second peaks, whereas metallic systems display distinct features including a non-zero inter-peak value and a characteristic "elephant peak."

I. Rodriguez, D. Hinojosa-Romero, R. M. Valladares, A. Valladares, A. A. ValladaresMon, 09 Ma🔬 cond-mat.mtrl-sci

Linearly Polarized Light-Induced Anomalous Hall Effect and Topological Phase Transitions in an Altermagnetic Topological Insulator

This study demonstrates that periodically driven linearly polarized light can uniquely induce an anomalous Hall effect and drive topological phase transitions in altermagnetic topological insulators by breaking their intrinsic symmetries, a phenomenon absent in conventional antiferromagnets, thereby offering a robust method for distinguishing these materials and enabling dissipationless spintronic applications.

Yichen Liu, Tongshuai Zhu, Haijun ZhangMon, 09 Ma🔬 cond-mat.mes-hall

Altermagnets Enable Gate-Switchable Helical and Chiral Topological Transport with Spin-Valley-Momentum-Locked Dual Protection

This paper establishes a unified framework in altermagnets, specifically identifying monolayer V2STeO and VO families, where a gate-tunable potential enables the electrical switching between robust helical and chiral topological transport phases via spin-valley-momentum-locked edge states.

Xianzhang Chen, Jiayong Zhang, Bowen Hao, Jiahui Qian, Ziye Zhu, Igor Zutic, Zhenyu Zhang, Tong ZhouMon, 09 Ma🔬 cond-mat.mes-hall

Epitaxial stabilization of magnetic GdAuSb/LaAuSb superlattices

This study reports the successful epitaxial stabilization of magnetic GdAuSb films and GdAuSb/LaAuSb superlattices on Al2_2O3_3 substrates, revealing their shared YPtAs crystal structure, similar electronic band structures with a rigid hole-like shift, and distinct magnetic transitions that establish a new platform for controlling magnetic and topological orders through tunable intralayer exchange and reduced dimensionality.

Patrick J. Strohbeen, Soohyun Im, Tamalika Samanta, Zachary LaDuca, Dongxue Du, Estiaque H. Shourov, Jessica L. McChesney, Fanny Rodolakis, Paul M. Voyles, Jason K. KawasakiMon, 09 Ma🔬 cond-mat.mtrl-sci

Nanoscale Electronic Phase Separation Driven by Fe-site Ordering in Fe\textsubscript{5-x}GeTe\textsubscript{2}

By combining high-resolution scanning tunneling microscopy with density functional theory, this study reveals that Fe-site ordering in the van der Waals ferromagnet Fe5−x_{5-x}GeTe2_2 drives nanoscale electronic phase separation, where ordered Fe(1) domains exhibit metallic behavior while deficient regions display pseudogapped states due to symmetry-allowed Fe 3d-Te 5p orbital hybridization.

Shreyashi Sinha, Ayan Jana, Suchanda Mondal, Ravi Prakash Singh, Manoranjan Kumar, Sujit MannaMon, 09 Ma🔬 cond-mat.mes-hall

A recipe for scalable attention-based MLIPs: unlocking long-range accuracy with all-to-all node attention

This paper introduces AllScAIP, a scalable, attention-based machine-learning interatomic potential that leverages all-to-all node attention to effectively capture long-range interactions and achieve state-of-the-art accuracy across diverse molecular and material systems without relying on explicit physics-based terms.

Eric Qu, Brandon M. Wood, Aditi S. Krishnapriyan, Zachary W. UlissiMon, 09 Ma🔬 cond-mat.mtrl-sci

Few-Shot Neuromorphic Vision in a Nonlinear Photonic Network Laser

This paper introduces a retinally-inspired photonic computing system based on a random network laser that utilizes heterogeneous, inhibitively-coupled lasing modes to achieve high-accuracy few-shot classification and segmentation, outperforming state-of-the-art software models in low-data regimes.

Wai Kit Ng, Jakub Dranczewski, Anna Fischer, T V Raziman, Dhruv Saxena, Tobias Farchy, Kilian Stenning, Jonathan Peters, Heinz Schmid, Will R Branford, Mauricio Barahona, Kirsten Moselund, Riccardo Sapienza, Jack C. GartsideFri, 13 Ma🔬 cond-mat.mes-hall

Interlayer Charge-density-wave Vector Phase Induced Structural Chirality

This study reveals that interlayer charge-density-wave vector phases drive structural chirality in layered materials, successfully predicting chiral structures in AV3_3Sb5_5 and 1T-TiSe2_2 that match experimental data while identifying 1T-NbSe2_2 as a promising candidate and demonstrating that chiral CDW order can be manipulated via electron filling.

Sen Shao, Wei-Chi Chiu, Tao Hou, Naizhou Wang, Ilya Belopolski, Yilin Zhao, Jinyang Ni, Qi Zhang, Yongkai Li, Jinjin Liu, Mohammad Yahyavi, Yuanjun Jin, Qiange Feng, Peiyuan Cui, Cheng-Long Zhang, Yugui Yao, Zhiwei Wang, Jia-Xin Yin, Su-Yang Xu, Qiong Ma, Wei-bo Gao, Md Shafayat Hossain, Arun Bansil, Guoqing ChangFri, 13 Ma🔬 cond-mat.mtrl-sci

Optical control of the crystal structure in the bilayer nickelate superconductor La3_3Ni2_2O7_7 via nonlinear phononics

This study theoretically proposes that resonant optical excitation of infrared-active lattice vibrations can induce nonlinear phononics to straighten the interlayer Ni-O-Ni bond angle in the bilayer nickelate La3_3Ni2_2O7_7, offering a light-based alternative to pressure for controlling its crystal structure toward superconductivity.

Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki, Masayuki OchiFri, 13 Ma🔬 physics.optics

Stabilized biskyrmion states in annealed CoFeB bilayer with different interfaces

This study demonstrates that annealing CoFeB/Ta/CoFeB bilayers enhances interfacial Dzyaloshinskii-Moriya interaction and crystallinity to stabilize the spontaneous coexistence of skyrmions and biskyrmions at room temperature, revealing their distinct interaction behaviors and potential for advanced spintronic applications.

W. Al Saidi, S. Amara, M. T. Zar Myint, S. Al Harthi, G. Setti, R. SbiaaFri, 13 Ma🔬 physics.app-ph

Kekulé order from diffuse nesting near higher-order Van Hove points

This paper demonstrates that "diffuse nesting," arising from the combination of anisotropic band flattening near higher-order Van Hove singularities and thermal Fermi surface broadening, drives the formation of a 3×3\sqrt{3}\times\sqrt{3} Kekulé density wave even in the absence of conventional Fermi surface nesting.

Jonas Beck, Jonathan Bodky, Matteo Dürrnagel, Ronny Thomale, Julian Ingham, Lennart Klebl, Hendrik HohmannFri, 13 Ma🔬 cond-mat.mtrl-sci