Article
Chemistry, Physical
Ying Li, Xinyu Xu, Mengxian Lan, Suen Wang, Tian Huang, Hong Wu, Feng Li, Yong Pu
Summary: This study predicts a two-dimensional material, MoGe2P4, with large valley spin splitting and excellent optical absorption properties. The results demonstrate its potential applications in valley electronics and optoelectronic devices, supported by its band characteristics and how it changes under biaxial strain.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Md. S. Hossain, M. K. Ma, K. A. Villegas-Rosales, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan
Summary: The interplay between the Fermi sea anisotropy, electron-electron interaction, and localization phenomena can give rise to exotic many-body phases. This study reports the observation of an ordered anisotropic Wigner solid in a clean two-dimensional electron system with anisotropic effective mass and Fermi sea.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Klaus Zollner, Aron W. Cummings, Stephan Roche, Jaroslav Fabian
Summary: By using first-principles calculations, we investigated the electronic band structure of graphene on different hexagonal nitride insulators and extracted the spin-orbit coupling (SOC) parameters. The results show that the stacking symmetry has a significant impact on the spin-orbit parameters, especially the Rashba SOC, which can be tuned by an external electric field.
Article
Materials Science, Multidisciplinary
Qirui Cui, Yingmei Zhu, Jinghua Liang, Ping Cui, Hongxin Yang
Summary: Materials like the VSi2N4 monolayer exhibit ferromagnetism, semiconductor properties, and valley-contrasting physics, making them potential candidates for spintronic and valleytronic applications. Under specific conditions, these materials can achieve valley polarization and display anomalous valley Hall effects.
Article
Chemistry, Physical
Jiajia Chen, Kai Wu, Wei Hu, Jinlong Yang
Summary: Research shows that 2D polar perovskites have large Rashba constants and strong electric field responses, making them suitable for use in spin FETs, enabling a short spin channel length of tens of nanometers to preserve spin coherence.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
M. R. Losada, A. T. Costa, B. Biel, J. Fernandez-Rossier
Summary: This study investigates the indirect exchange interactions between localized spins of magnetic impurities in spin valley coupled systems using the Kane-Mele model. The research shows that perturbation theory works well even in nonperturbative regime and explores the effects of symmetry and crystallographic direction on the indirect exchange. They also explore the potential of using indirect exchange combined with atomic manipulation to engineer specific models.
Article
Materials Science, Multidisciplinary
Dmitry Miserev, Jelena Klinovaja, Daniel Loss
Summary: The research focuses on the magnetic instabilities of two-valley semiconductors with spin-orbit interaction, in-plane magnetic field, and electron-electron interaction. It reveals the presence of four nontrivial magnetic phases and the existence of two tricritical points at zero temperature.
Article
Materials Science, Multidisciplinary
Benjamin Sanvee, Jakob Schluck, Mihai Cerchez, Dominique Mailly, Hans W. Schumacher, Klaus Pierz, Thomas Heinzel, Juergen Horbach
Summary: Using experiment and simulation, we study the magnetotransport in a two-dimensional disordered Lorentz gas with circular obstacles. We find that for high obstacle density, a linear relationship between Hall resistance and magnetic field is observed only at very low magnetic fields, with a Hall coefficient that does not accurately reflect the carrier density. At larger magnetic fields, nonlinearity of the Hall resistance due to classical memory effects is observed.
Article
Materials Science, Multidisciplinary
Justin Copenhaver, Jukka Vayrynen
Summary: This paper investigates the effect of spin-rotational symmetry-breaking perturbations on the spin conductance of two-dimensional topological insulators (2D TIs). By defining the spin current operator and introducing a four-terminal setup, the properties of spin conductance are explored and the key role of spin torque in out-of-equilibrium edges is identified. Using numerical simulations, spin transport in a topological monolayer WTe2 material is studied, and the spin conductance and characteristic spin decay length are calculated. The results show that the spin Hall conductance is robust to spin symmetry-breaking perturbations as long as time-reversal symmetry is preserved and interedge scattering is weak.
Article
Materials Science, Multidisciplinary
Ankita Bhattacharya, S. K. Firoz Islam
Summary: The study investigates the band structure modulation and spin-Hall effect of an irradiated two-dimensional heavy-hole system with k(3)-Rashba spin-orbit coupling. It is found that under illumination, the band structure becomes anisotropic and additional spin-degeneracy points emerge in the energy dispersion, solely determined by the incident light's amplitude. When these points occur near the Fermi level, a resonance in spin-Hall conductivity is observed, while away from the degeneracy points, the average spin polarization is rotated by the light. Additionally, the effects of k(3)-Dresselhaus spin-orbit coupling are discussed.
Article
Multidisciplinary Sciences
Gaoting Lin, Jaehong Jeong, Chaebin Kim, Yao Wang, Qing Huang, Takatsugu Masuda, Shinichiro Asai, Shinichi Itoh, Gerrit Guenther, Margarita Russina, Zhilun Lu, Jieming Sheng, Le Wang, Jiucai Wang, Guohua Wang, Qingyong Ren, Chuanying Xi, Wei Tong, Langsheng Ling, Zhengxin Liu, Liusuo Wu, Jiawei Mei, Zhe Qu, Haidong Zhou, Xiaoqun Wang, Je-Geun Park, Yuan Wan, Jie Ma
Summary: The compound Na2Co2TeO6 (NCTO) is proposed as a potential Kitaev system with a field-induced spin-disordered state, expanding the Kitaev model to 3d compounds and sparking further interest in the spin-orbital effect in quantum magnets.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Dimitri Pimenov, Alex Kamenev, Andrey Chubukov
Summary: Forward scattering and backscattering are crucial in the physics of two-dimensional interacting fermions, leading to nonanalytic behavior in the fermionic scattering rate. Higher powers of ln(omega) are found in the backscattering contribution at higher orders. By extending Fermi liquid to a certain limit, planar processes dominate and provide insights into the scattering rate behavior in different interaction scenarios.
Article
Materials Science, Multidisciplinary
A. Ceferino, S. J. Magorrian, V Zolyomi, D. A. Bandurin, A. K. Geim, A. Patane, Z. D. Kovalyuk, Z. R. Kudrynskyi, I. Grigorieva, V. Fal'ko
Summary: The paper demonstrates the tunability of spin-orbit coupling strength in few-layer gamma-InSe films, potentially enabling electrically switchable spintronic devices. Theoretical calculations and experimental measurements show good agreement in terms of Dyakonov-Perel spin relaxation due to SOC.
Article
Physics, Multidisciplinary
Chuyao Tong, Annika Kurzmann, Rebekka Garreis, Wei Wister Huang, Samuel Jele, Marius Eich, Lev Ginzburg, Christopher Mittag, Kenji Watanabe, Takashi Taniguchi, Klaus Ensslin, Thomas Ihn
Summary: The study reports experiments on coupled bilayer graphene double quantum dots, where the spin and valley states are precisely controlled, enabling the observation of two-electron combined blockade physics. The switching of selection rules is demonstrated by switching between different ground states with gate and magnetic-field tuning, showing either valley blockade or spin blockade depending on the ground state configuration.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Yan Li, Yanzhao Wu, Li Deng, Xiang Yin, Xiaoli Han, Fubo Tian, Xianmin Zhang
Summary: In this paper, monolayer Cr2S3 is proven to be a ferromagnetic (FM) semiconductor with a perpendicular magnetic anisotropy energy. It also exhibits spontaneous valley polarization and can switch between ferromagnetic and antiferromagnetic states under strain. The valley polarization reversion can be achieved by an external electric field. This research provides a promising candidate for manipulating valley and spin physics.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Evgenii Sterkhov, Nikolay M. Chtchelkatchev, Elena Mostovshchikova, Roman E. Ryltsev, Sergey A. Uporov, Gheorghe L. Pascut, Andrey Fetisov, Svetlana G. Titova
Summary: PrBaMn2O6 with ordered alternate stacking of PrMnO3/BaMnO3 layers exhibits two magnetic phase transitions close to room temperature, making it a promising magnetocaloric and magnetoresistive material. The experimentally detected structural transition is attributed to the splitting of eg-doublet states due to the tendency towards orbital ordering at the metal-insulator phase transition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
S. A. Uporov, R. E. Ryltsev, V. A. Sidorov, S. Kh Estemirova, E. Sterkhov, I. A. Balyakin, N. M. Chtchelkatchev
Summary: The study explores the pressure effects on the electronic structure and electrical conductivity of TiZrHfNb alloy. It shows that the resistance of the alloy decreases linearly by 12.5% as the pressure increases to 5.5 GPa and is mainly determined by residual resistance and Mott's s-d scattering. The alloy is a Curie-Weiss paramagnet and a type-II superconductor with a critical temperature of about 6.3 K.
Article
Chemistry, Physical
I. Sterkhova, L. Kamaeva, N. M. Chtchelkatchev, V. Lad'yanov
Summary: The study investigates the influence of carbon concentration on phase equilibria, crystallization processes, and structure of Fe-Cr-C alloys, revealing the minimum undercoolability at around 14% C and a decrease in microhardness with increasing carbon concentration. The nonequilibrium crystallization is found to be related to the peculiarities of interatomic interaction in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
V. A. Levashov, R. E. Ryltsev, N. M. Chtchelkatchev
Summary: This study investigates the local structural similarity between the parent-liquid and children-crystal states in a model soft-matter system, revealing that at different pressures the system crystallizes into significantly different structures. The results demonstrate the importance of orientational ordering in understanding the behavior of liquids and the crystallization process.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
I. P. Zibrova, V. P. Filonenkoa, V. A. Sidorova, N. M. Chtchelkatcheva, M. V. Magnitskayaa
Summary: A new high-pressure modification, VO2(S), was obtained by thermobaric treatment of a stoichiometric mixture of V2O3 + V2O5 powders. The crystal structure of VO2(S) is double-layered, with distorted VO6 octahedra as the structural units. It undergoes a weak first-order phase transition. The charge and heat transport properties were evaluated through density functional calculations and the semiclassical Boltzmann approach.
Article
Chemistry, Physical
Sergey V. Streltsov, Roman E. Ryltsev, Nikolay M. Chtchelkatchev
Summary: In recent years, the A-site ordered half-doped double-perovskite manganites RBaMn2O6 have gained significant attention for their exceptional physical properties and potential applications. This study investigates the origin of the ground-state structure and the electronic and magnetic properties of PrBaMn2O6. The findings offer insights into understanding the contradictions in experimental data and provide a theoretical foundation for refining the ground state structures in other RBaMn2O6 compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
D. O. Skanchenko, E. V. Altynbaev, V. A. Sidorov, G. Chaboussant, N. Martin, A. E. Petrova, D. A. Salamatin, S. V. Grigoriev, N. M. Chtchelkatchev, M. V. Magnitskaya, A. V. Tsvyaschenko
Summary: We conducted a comprehensive study on Fe1-xRhxGe compounds, covering the entire concentration range using various techniques. We discovered an internal splitting of crystallographic and magnetic states for intermediate compositions, despite their apparent similarity. Theoretical analysis and experimental data revealed that this splitting occurs within single crystallites with a common space group, but with different magnetic structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
N. M. Chtchelkatchev, R. E. Ryltsev, A. V. Mikheyenkov, V. E. Valiulin, I. Ya. Polishchuk
Summary: A general problem in studying supercooled liquids and glasses is the long relaxation times that make it difficult to determine dynamic characteristics explicitly. To solve this issue, one approach is to extrapolate values of a dynamical property, such as viscosity, from a temperature range where it can be directly measured or simulated to the low-temperature region. However, such extrapolations often lead to contradictory results due to different fitting functions. This paper proposes a model-free statistical algorithm for low-temperature extrapolation of liquid viscosity and diffusion coefficient, utilizing numerical analytical continuation and error correction procedures. The method has been tested on various glass-forming systems and showed good stability and predictability.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
S. G. Menshikova, N. M. Chtchelkatchev, V. V. Brazhkin
Summary: High pressures enable the synthesis of new metastable compounds that remain intact under normal conditions. In this study, we investigated the structure of a glass-forming eutectic alloy obtained through rapid cooling from the melt at a temperature of 1800 K and a pressure of 10 GPa. Our findings reveal the formation of new stable crystalline phases with cubic and tetragonal structures in the alloy.
Article
Physics, Multidisciplinary
Valerii E. Valiulin, Andrey V. V. Mikheyenkov, Nikolay M. Chtchelkatchev, Kliment I. Kugel
Summary: The Kugel-Khomskii model, which involves spin and orbital degrees of freedom, serves as a useful tool for studying important aspects of quantum information processing, such as robust gaps in entanglement spectra. In this study, we demonstrate that entanglement can remain robust even under temperature effects within a wide range of parameters. Interestingly, the temperature dependence of entanglement often exhibits a nonmonotonic behavior, with ranges of model parameters where entanglement is absent at zero temperature, but emerges, reaches a maximum, and then disappears with increasing temperature.
SCIPOST PHYSICS CORE
(2023)
Article
Chemistry, Physical
N. M. Chtchelkatchev, R. E. Ryltsev, M. V. Magnitskaya, S. M. Gorbunov, K. A. Cherednichenko, V. L. Solozhenko, V. V. Brazhkin
Summary: Boron phosphide (BP) is a hard semiconductor composed of light elements and has potential applications under extreme conditions. The behavior of BP at high temperatures and pressures is not well understood, but machine learning interatomic potentials provide a unique opportunity to study it accurately. A deep machine learning potential (DP) has been developed for accurate simulations of BP, which agrees with experimental and ab initio molecular dynamics data. The simulations reveal structural transformations and anomalous behavior of BP under compression and raise open questions for further studies.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
P. A. Nosov, D. S. Shapiro, M. Goldstein, I. S. Burmistrov
Summary: Using dissipation to control the creation of nontrivial quantum many-body correlated states is both fundamentally important and practically useful. In this study, we investigated the effect of number conservation in a paradigmatic two-band system with dissipative dynamics. We found that the system exhibits diffusive behavior for particle and hole density modes at intermediate length- and timescales, which can only be excited nonlinearly. We also identified processes that limit this diffusive behavior at the longest length- and timescales, leading to a reaction-diffusion dynamics described by the Fisher-Kolmogorov-Petrovsky-Piskunov equation, causing the designed dark state to become unstable.
Article
Materials Science, Multidisciplinary
Mathieu Lizee, Matthias Stosiek, Igor Burmistrov, Tristan Cren, Christophe Brun
Summary: The interplay between superconductivity and disorder leads to complex phenomena. It is predicted that the peculiar structure of diffusive electronic wave functions can increase the superconducting critical temperature in a certain range of disorder. In this work, a monolayer of lead with a simple band structure and homogeneous structural disorder is used as a model system to study the fluctuations of local density of states (LDOS) and spectral energy gap in a two-dimensional superconductor in the weak-antilocalization regime. The study shows that mesoscopic LDOS fluctuations can be used to locally probe both the elastic and inelastic scattering rates, which are difficult to measure in transport measurements.
Article
Materials Science, Multidisciplinary
M. V. Parfenov, V. Yu. Kachorovskii, I. S. Burmistrov
Summary: We develop a theory of anomalous elasticity in disordered two-dimensional flexible materials. We predict the existence of anisotropic flat phases with power-law scaling of bending rigidity and Young's modulus controlled by a single universal exponent. These flat phases undergo a crumpling transition with an increase of temperature or disorder, and the anisotropic materials crumple into a tubular phase instead of simultaneous crumpling in all directions as in isotropic materials.
Article
Physics, Multidisciplinary
E. S. Andriyakhina, I. S. Burmistrov
Summary: This study investigates the multifractally enhanced superconducting states in two-dimensional systems with the interplay of Anderson localization and electron-electron interactions in the presence of spin-orbit coupling. The energy dependence of the superconducting spectral gap is found to be induced by multifractal correlations. The superconducting transition temperature and spectral gap are determined for different coupling cases. Mesoscopic fluctuations of the local density of states in the superconducting state are also studied, and it is found that spin-orbit coupling reduces the amplitude of fluctuations.
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2022)
