Article
Physics, Multidisciplinary
C. L. Tschirhart, Evgeny Redekop, Lizhong Li, Tingxin Li, Shengwei Jiang, T. Arp, O. Sheekey, Takashi Taniguchi, Kenji Watanabe, M. E. Huber, Kin Fai Mak, Jie Shan, A. F. Young
Summary: Magnetic switching via spin-orbit torque is demonstrated in a moire bilayer, providing a platform for spintronic applications.
Article
Chemistry, Multidisciplinary
Felipe Crasto de Lima, Adalberto Fazzio
Summary: Vacancies play a crucial role in the topological transition of transition metal dichalcogenides, inducing a topologically nontrivial phase. Vacancy states in PtSe2 result in a large topological gap within the pristine system gap, allowing the construction of backscattering protected metallic channels embedded in a semiconducting host.
Article
Multidisciplinary Sciences
Aditya Sood, Xiaozhe Shen, Yin Shi, Suhas Kumar, Su Ji Park, Marc Zajac, Yifei Sun, Long-Qing Chen, Shriram Ramanathan, Xijie Wang, William C. Chueh, Aaron M. Lindenberg
Summary: Understanding the pathways and time scales underlying electrically driven insulator-metal transitions is vital for uncovering the fundamental limits of device operation. By using stroboscopic electron diffraction, researchers discovered an electrically triggered, isostructural state that forms transiently on microsecond time scales and established electrical excitation as a route for uncovering nonequilibrium and metastable phases in correlated materials. This metastable phase is similar to that formed under photoexcitation within picoseconds, suggesting a universal transformation pathway.
Article
Materials Science, Multidisciplinary
R. Nakamura, D. Takegami, A. Melendez-Sans, L. H. Tjeng, M. Okawa, T. Miyoshino, N. L. Saini, M. Kitamura, D. Shiga, H. Kumigashira, M. Yoshimura, K-D Tsuei, Y. Okamoto, T. Mizokawa
Summary: The electronic structure of CsW2O6 during its metal-insulator transition has been studied using hard/soft x-ray photoelectron spectroscopy. The transition is accompanied by the formation of a band gap attributed to the trimerization of W sites.
Article
Chemistry, Physical
Jean-Louis Victor, Manuel Gaudon, Giorgio Salvatori, Olivier Toulemonde, Nicolas Penin, Aline Rougier
Summary: In this study, highly crystallized Fe-doped VO2 powders were successfully synthesized using a carbo-thermal reduction process, with Fe doping impacting the crystal structure and phase transition of VO2. The transition temperature was significantly increased to 134 degrees C, marking a breakthrough in VO2-type thermochromic materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Woonbae Sohn, Taemin Ludvic Kim, Tae Hyung Lee, Sangmoon Yoon, Chungsoo Kim, Jung-Woo Yoo, Kwang Chul Roh, Miyoung Kim, Ho Won Jang
Summary: This study demonstrates how the formation of a two-dimensional electron gas (2DEG) at the LaAlO3 (LAO)/SrTiO3 (STO) interface can be manipulated by controlling the octahedral tilt of perovskite oxides through interface engineering.
Article
Physics, Condensed Matter
Namrata Gurung, Chennan Wang, Nicholas S. Bingham, Joel A. T. Verezhak, Kazunari Yamaura, Giuseppe Allodi, Paola Caterina Forino, Samuele Sanna, Hubertus Luetkens, V Scagnoli
Summary: Using muon spin rotation and relaxation (μSR) and Na-23 nuclear magnetic resonance (NMR) spectroscopic methods, we investigated the temperature evolution of magnetic order parameters in the NaOsO3 antiferromagnetic phase, as well as the role of magnetic fluctuations at the Neel temperature. Our results suggest that anomalies in electrical resistivity near 30 K may be attributed to a reduction in Os magnetic moment associated with spin fluctuations, with no significant changes in spin fluctuations frequency or localized Os magnetic moment below 50 K.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Applied
Yongchang Ma, Guoqiang Xiao, Li Du, Ang Li, Dong Wu
Summary: The electric pulses induced multiple nonvolatile resistance states in (V0.99Cr0.01)(2)O-3 due to the first-order metal to insulator phase transition, and a convenient reset can be achieved by joule heating. Calculations showed that the potential difference near the metal-insulator boundaries close to the insulating side is significantly larger, driving the resistance jumps. The multi-resistance states or the nonvolatile resistance properties excited simply by electric pulses are of great significance for the explorations of solid-state devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Hanbum Park, Kwangsik Jeong, InHee Maeng, Kyung Ik Sim, Sachin Pathak, Jonghoon Kim, Seok-Bo Hong, Taek Sun Jung, Chul Kang, Jae Hoon Kim, Jongill Hong, Mann-Ho Cho
Summary: Researchers induced dehybridization of ultrathin topological insulator films by breaking inversion symmetry between surfaces, leading to enhanced spin-charge conversion efficiency. By growing the film on an oxygen-deficient transition-metal oxide, they observed up to a 2.4 times increase in SCC efficiency through this method.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Zheng Ma, Laura Fuentes-Rodriguez, Zhengwei Tan, Eva Pellicer, Llibertat Abad, Javier Herrero-Martin, Enric Menendez, Nieves Casan-Pastor, Jordi Sort
Summary: Magneto-ionics is a unique approach to control magnetism with electric field. This study demonstrates wireless control of magnetism through induced polarization in conducting materials, providing a new pathway for voltage-driven magnetism control. The results have potential applications in various fields such as bioelectronics, catalysis, neuromorphic computing, and wireless communications.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Ivica Zivkovic, Virgile Favre, Catalina Salazar Mejia, Harald O. Jeschke, Arnaud Magrez, Bhupen Dabholkar, Vincent Noculak, Rafael S. Freitas, Minki Jeong, Nagabhushan G. Hegde, Luc Testa, Peter Babkevich, Yixi Su, Pascal Manuel, Hubertus Luetkens, Christopher Baines, Peter J. Baker, Jochen Wosnitza, Oksana Zaharko, Yasir Iqbal, Johannes Reuther, Henrik M. Ronnow
Summary: Quantum spin liquids are exotic states of matter that form under strong frustrated magnetic interactions, with interconnected spin-1 trillium lattices exhibiting a significantly elevated level of geometrical frustration. Experimental and computational analysis showed a highly correlated and dynamic three-dimensional network structure with characteristics resembling a quantum spin liquid state under specific conditions.
PHYSICAL REVIEW LETTERS
(2021)
Correction
Chemistry, Multidisciplinary
Woonbae Sohn, Taemin Ludvic Kim, Tae Hyung Lee, Kyeongpung Lee, Sangmoon Yoon, Chungsoo Kim, Seungwu Han, Jung-Woo Yoo, Kwang Chul Roh, Miyoung Kim, Ho Won Jang
Summary: The study demonstrates that the metal-to-insulator transition can be suppressed by achieving strong interfacial coupling at cubic and orthorhombic perovskite oxide heterointerfaces. This provides a new perspective for further research in the relevant field.
Article
Multidisciplinary Sciences
Shobhit Goel, Nguyen Huynh Duy Khang, Yuki Osada, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka
Summary: We demonstrate room-temperature spin injection using spin pumping in a BiSb/(Ga,Fe)Sb heterostructure, where (Ga,Fe)Sb is a ferromagnetic semiconductor with high Curie temperature and BiSb is a topological insulator. Despite the small magnetization of (Ga,Fe)Sb at room temperature, we detected spin injection from (Ga,Fe)Sb by utilizing the large inverse spin Hall effect in BiSb. This study provides the first demonstration of room-temperature spin injection from a ferromagnetic semiconductor.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Applied
Tingting Tang, Yujie Tang, Lei Bi, Tongtong Kang, Xiao Liang, Jun Qin, Jie Li, Li Luo, Chaoyang Li
Summary: This study utilizes the photonic spin Hall effect and quantum weak measurement to achieve real-time detection and highly sensitive analysis of the phase transition process of VO2 films. It does not involve mechanical adjustment and provides high measurement resolution and visualization capability.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ryota Teruya, Tetsu Sato, Masahiro Yamashita, Noriaki Hanasaki, Akira Ueda, Masaki Matsuda
Summary: This study demonstrates the reversible control of a molecular Mott insulator by chemical carrier doping and dedoping, highlighting the importance of chemical doping in molecular Mott insulators.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Multidisciplinary
Evgeny A. Stepanov, Yusuke Nomura, Alexander I. Lichtenstein, Silke Biermann
Summary: This study investigates the spatial symmetry and orbital structure of magnetic fluctuations in perovskite materials using a consistent multiorbital diagrammatic extension of dynamical mean-field theory. The findings reveal that the local Hund's coupling plays a significant role in determining the form of spatial spin fluctuations, with small coupling leading to anisotropic fluctuations and large coupling enhancing collective spin excitations. Additionally, the study demonstrates that orbital isotropy can be induced under certain conditions, impacting the magnetic instability of the system.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Evgeny A. Stepanov, Viktor Harkov, Malte Rosner, Alexander Lichtenstein, Mikhail Katsnelson, Alexander N. Rudenko
Summary: Recently fabricated InSe monolayers exhibit remarkable characteristics that indicate the potential of this material to host a number of many-body phenomena. In this work, the collective electronic effects in hole-doped InSe monolayers are systematically described, and it is found that the electron-phonon interaction does not play a crucial role in these effects, while the electronic structure and Coulomb interactions play important roles.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Michael Danilov, Erik G. C. P. van Loon, Sergey Brener, Sergei Iskakov, Mikhail Katsnelson, Alexander Lichtenstein
Summary: This study investigates the physics of high-temperature cuprate superconductors using the highly degenerate four-site plaquette of the t - t' - U Hubbard model as a reference system. The degeneracy leads to strong fluctuations in a lattice of plaquettes, and it is shown that there is a significant binding energy between holes when considering a set of four plaquettes. The next-nearest-neighbour hopping t' plays a crucial role in the formation of strongly bound electronic bipolarons, which could explain superconductivity at lower temperatures.
NPJ QUANTUM MATERIALS
(2022)
Article
Chemistry, Physical
K. J. Kapcia, V. Tkachenko, F. Capotondi, A. Lichtenstein, S. Molodtsov, L. Mueller, A. Philippi-Kobs, P. Piekarz, B. Ziaja
Summary: This study uses a newly developed simulation tool to describe electronic processes in nanoscopic scale in X-ray irradiated ferromagnetic materials. The research focuses on the Co/Pt multilayer system and finds that electronic processes play a predominant role in X-ray induced demagnetization.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. B. Shick, M. Tchaplianka, A. I. Lichtenstein
Summary: We present density functional theory plus exact diagonalization calculations of the multiorbital Anderson impurity model for the Co adatom on Cu(001) surface. The results show the existence of a singlet many-body ground state and Kondo resonance for the Co atom with an approximate d-shell occupation of nd ≈ 8 when the spin-orbit coupling is included. The differential conductance obtained from the calculations agrees well with scanning tunneling microscopy measurements. These findings highlight the essential role of spin-orbit coupling in the formation of a Kondo singlet for a multiorbital impurity in low dimensions.
Article
Materials Science, Multidisciplinary
E. A. Stepanov, S. Brener, V Harkov, M. Katsnelson, A. Lichtenstein
Summary: This article discusses the theoretical description of magnetic materials, highlights the presence of local magnetic moments at high temperatures, and provides a deeper understanding of spin behavior through path-integral techniques.
Article
Materials Science, Multidisciplinary
Alexey N. Rubtsov, Evgeny A. Stepanov, Alexander Lichtenstein
Article
Materials Science, Multidisciplinary
Friedrich Krien, Angelo Valli, Patrick Chalupa, Massimo Capone, Alexander Lichtenstein, Alessandro Toschi
Article
Materials Science, Multidisciplinary
M. Vandelli, V Harkov, E. A. Stepanov, J. Gukelberger, E. Kozik, A. Rubio, A. Lichtenstein
Article
Materials Science, Multidisciplinary
Hristiana Atanasova, Alexander Lichtenstein, Guy Cohen
Article
Materials Science, Multidisciplinary
Malte Harland, Sergey Brener, Mikhail Katsnelson, Alexander Lichtenstein
Article
Materials Science, Multidisciplinary
E. A. Stepanov, V Harkov, A. Lichtenstein
Article
Materials Science, Multidisciplinary
L. Peters, E. G. C. P. van Loon, A. N. Rubtsov, A. Lichtenstein, M. Katsnelson, E. A. Stepanov
Article
Materials Science, Multidisciplinary
S. Link, S. Forti, A. Stoehr, K. Kuester, M. Roesner, D. Hirschmeier, C. Chen, J. Avila, M. C. Asensio, A. A. Zakharov, T. O. Wehling, A. Lichtenstein, M. Katsnelson, U. Starke
Article
Physics, Multidisciplinary
Patryk Kubiczek, Alexey N. Rubtsov, Alexander I. Lichtenstein
