Article
Multidisciplinary Sciences
Nader Zaki, Genda Gu, Alexei Tsvelik, Congjun Wu, Peter D. Johnson
Summary: Topological superconductivity has been discovered in the high-Tc family of superconductors FeTe1-xSex, with evidence of Majorana fermions in the surface state. High-resolution laser-based photo-emission studies have revealed the interplay of topology, magnetism, and superconductivity in this system, showing the potential for exotic topological phenomena.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Guanghui Cheng, Mohammad Mushfiqur Rahman, Zhiping He, Andres Llacsahuanga Allcca, Avinash Rustagi, Kirstine Aggerbeck Stampe, Yanglin Zhu, Shaohua Yan, Shangjie Tian, Zhiqiang Mao, Hechang Lei, Kenji Watanabe, Takashi Taniguchi, Pramey Upadhyaya, Yong P. Chen
Summary: The researchers studied the heterostructures of CrI3 and CrCl3 using magneto-optical Kerr effect microscopy and found ferromagnetic interfacial coupling between the two materials. They also discovered that the coercivity of the heterostructure can be controlled by an electric field.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
P. J. Scheidegger, S. Diesch, M. L. Palm, C. L. Degen
Summary: In this paper, we present the implementation of a scanning nitrogen-vacancy (NV) magnetometer in a dry dilution refrigerator. By utilizing pulsed optically detected magnetic resonance and efficient microwave delivery through a co-planar waveguide, we successfully achieved magnetic field imaging of superconducting vortices at sub-Kelvin temperatures with high sensitivity.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Hang Yin, Ruishu Yang, Shuanhu Wang, Kexin Jin
Summary: Chemical doping is a dominant method for manipulating oxide two-dimensional electron gas (2DEG). However, maintaining metallic conduction while enhancing the doping level remains challenging. In this study, a concept of high-entropy heterointerface is proposed and high-entropy heterointerfaces with different thicknesses and doping ratios are successfully fabricated. The results demonstrate the potential of this strategy to tailor 2DEG in all-oxide interfaces while maintaining its conductivity.
Article
Materials Science, Multidisciplinary
Takemi Yamada, Takami Tohyama
Summary: By utilizing density-functional theory, the origin of the nematic state in FeSe was investigated, revealing that increasing the on-site Coulomb interaction U results in topological changes in the Fermi surfaces of the normal state before the emergence of a nematic ground state. The nematic ground state is found to be a multipolar state with antiferrohexadecapoles and ferromultipoles on each Fe site, with cooperative coupling between different multipolar representations playing a crucial role.
Review
Chemistry, Multidisciplinary
Denys Makarov, Oleksii M. Volkov, Attila Kakay, Oleksandr V. Pylypovskyi, Barbora Budinska, Oleksandr V. Dobrovolskiy
Summary: This article discusses the impact of curvilinear geometry in various fields and outlines the future research prospects of curvilinear solid-state systems, with a focus on the latest developments and current challenges in curvilinear micro- and nanostructures, as well as new physics research directions and strong application potential.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xinlei Zhao, Fengjie Ma, Zhong-Yi Lu
Summary: This study investigates the electronic structure of the 1144-type quaternary compound CaKRu4P4 through first-principles density functional calculations, revealing its differences from iron-based superconductors and suggesting its potential as a phonon-mediated medium-coupled BCS superconductor. Under pressure, type-I and type-II Dirac fermions can be manipulated in the system, making CaKRu4P4 a promising platform for the exploration of topological physics and superconductivity.
Article
Materials Science, Multidisciplinary
Yang Zhang, Ling-Fang Lin, Adriana Moreo, Elbio Dagotto
Summary: Using ab initio density functional theory, we found that an orbital-selective Peierls phase (OSPP) develops in monolayer MoOCl2, leading to the dimerization of the Mo chain along the b axis. Specifically, Mo-d(xy) orbitals form robust molecular-orbital states, while Mo-d(xz/yz) orbitals remain delocalized. Overall, MoOCl2 is globally metallic, with the opening of a gap due to bonding-antibonding splitting of Mo-d(xy) orbitals and metallic conductivity contributed by Mo-d(xz/yz) orbitals.
Article
Materials Science, Multidisciplinary
Kun Woo Kim, T. Pereg-Barnea
Summary: Inspired by recent advances in the fabrication of surface superlattices, the study investigates the extended Hubbard model on a triangular lattice and reveals the competition and coexistence between magnetism and unconventional superconductivity in this geometrically frustrated structure. A rich phase diagram of various magnetic orders and pairing functions is obtained using the self-consistent mean field theory, and the phase transitions between different orders are explained by tracing the Fermi surface and identifying nesting vectors and Lifshitz transition.
Article
Materials Science, Multidisciplinary
Yang Zhang, Ling-Fang Lin, Adriana Moreo, Elbio Dagotto
Summary: This study theoretically investigates the structural and electronic properties of the quasi-two-dimensional α-RuI3 material. The results show that α-RuI3 is a metallic material, unlike α-RuCI3. The strong hybridization between Ru 4d and I 5p orbitals decreases electron localization in RuI3, resulting in its metallic nature. These findings provide guidance for experimentalists and theorists studying two-dimensional transition metal tri-iodide layered materials.
Article
Multidisciplinary Sciences
Christopher D. O'Neill, Julian L. Schmehr, Andrew D. Huxley
Summary: We report the superconducting properties of uranium diauride under high pressure, which also exhibits antiferromagnetic state and marginal fermi liquid characteristics. The superconductivity persists in high magnetic fields and may have an order parameter with multiple components, possibly hosting half-quantum vortices.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
Colin P. Harmer, Saeed Kamali, Oleg Lebedev, Shannon J. Lee, Raquel A. Ribeiro, Paul C. Canfield, Kirill Kovnir
Summary: Systematic synthesis and characterization of a new tetrahedral FeS-ethylenediamine intercalate compound were conducted. The crystal structure and composition were determined using various techniques, revealing the presence of iron vacancies and their effect on the magnetic properties.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Kazumasa Horigane, Masayuki Tadokoro, Ritsuko Eguchi, Hirofumi Ishii, Shinichi Nakamura, Takashi Kambe, Naoshi Ikeda, Hidenori Goto, Yoshihiro Kubozono, Jun Akimitsu
Summary: A graphite-like material BCx and its precursor phase were synthesized and characterized in this study. High-temperature annealing was found to improve the crystallinity and physical properties of BCx. Ti intercalation into the BCx system was found to compensate hole carriers and alter its magnetic properties.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
P. Menegasso, J. C. Souza, I Vinograd, Z. Wang, S. P. Edwards, P. G. Pagliuso, N. J. Curro, R. R. Urbano
Summary: Overlap of atomic wave functions is a key feature in conducting solids, particularly in heavy-fermion materials. Using NMR, researchers found strong direction dependence in the hybridization between f electrons and neighboring nuclear spins, providing a quantitative measure of orbital anisotropy in superconducting heavy-fermion materials.
Article
Physics, Multidisciplinary
Hai Lin, Dariusz Jakub Gawryluk, Yannick Maximilian Klein, Shangxiong Huangfu, Ekaterina Pomjakushina, Fabian von Rohr, Andreas Schilling
Summary: Motivated by the recent discovery of superconductivity in nickelate thin films, this study focuses on the synthesis and magnetization study of bulk samples of the parent compounds RNiO2. The results show spin-glass states with frequency-dependent peaks in the magnetic susceptibility and remarkable memory effects. The phenomenological parameters obtained from different spin glass models show strong similarity within these compounds and other rare-earth metal nickelates. The findings suggest a distinct nature of magnetism and superconductivity in the bulk nickelates compared to cuprate superconductors.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Zhicliang Wang, Ipsita Mandal, Suk Bum Chung, Sudip Chakravarty
Article
Materials Science, Multidisciplinary
Chen-Hsuan Hsu, Zhiqiang Wang, Sudip Chakravarty
Article
Physics, Condensed Matter
Sebastian Gemsheim, Ipsita Mandal, Krishnendu Sengupta, Zhiqiang Wang
EUROPEAN PHYSICAL JOURNAL B
(2020)
Article
Materials Science, Multidisciplinary
Xin Wang, Zhiqiang Wang, Catherine Kallin
Summary: This work theoretically studies the superconducting instabilities in Sr2RuO4 and finds that factors such as nonlocal SOC and orbital-anisotropy of the nonlocal interactions have a significant impact on the stability of superconducting pairing channels. The solution of d(x2- y2) + ig is in better agreement with the experimental data.
Article
Physics, Multidisciplinary
Wen Huang, Zhiqiang Wang
Summary: The exact nature of unconventional superconductivity in Sr2RuO4 remains a mystery, as no proposed superconducting order parameter can account for all experimental signatures. Alternative possibilities with complex mixtures of distinct helical p-wave order parameters have been proposed to explain the experimental results.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Rufus Boyack, Zhiqiang Wang, Qijin Chen, K. Levin
Summary: This study presents a consolidated equation for all low-field transport coefficients and addresses challenges in thermoelectric transport that arise from having two characteristic temperatures and two types of charge carriers. The research shows how bad-metal character and the presence of Fermi arcs in cuprates provide an explanation for classic pseudogap onset signatures in longitudinal resistivity.
Article
Physics, Multidisciplinary
Yu Li, Zhiqiang Wang, Wen Huang
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Zhiqiang Wang, Gaurav Chaudhary, Qijin Chen, K. Levin
Article
Materials Science, Multidisciplinary
Zhiqiang Wang, Xin Wang, Catherine Kallin
Article
Materials Science, Multidisciplinary
John F. Dodaro, Zhiqiang Wang, Catherine Kallin
Article
Materials Science, Multidisciplinary
Xin Wang, Zhiqiang Wang, Catherine Kallin
Article
Materials Science, Multidisciplinary
Zhiqiang Wang, John Berlinsky, Gertrud Zwicknagl, Catherine Kallin
Article
Materials Science, Multidisciplinary
Zhiqiang Wang, Sudip Chakravarty
Article
Materials Science, Multidisciplinary
Zhiqiang Wang, Sudip Chakravarty
Article
Materials Science, Multidisciplinary
Zhiqiang Wang, Rufus Boyack, K. Levin
Summary: We study the anomalous charge and heat transport coefficients of metallic systems at finite temperature, showing a strong connection between inelastic dissipation and Berry-curvature physics. Our calculations reveal that the important anomalous Wiedemann-Franz ratio is nonuniversal at finite temperatures, potentially exhibiting either an increase or decrease as temperature rises.