Layer-Valley Hall Effect under Inversion and Time-Reversal Symmetries

作     者：赵交交 刘贵斌 陈鹏 姚裕贵 张广宇 杜罗军 Jiaojiao Zhao;Gui-Bin Liu;Peng Chen;Yugui Yao;Guangyu Zhang;Luojun Du

作者机构：Beijing National Laboratory for Condensed Matter Physicsand Key Laboratory for Nanoscale Physics and DevicesInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100190China Centre for Quantum PhysicsKey Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China Schoolof MicroelectronicsSouthern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials LaboratoryDongguan 523808China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2024年第41卷第6期

页      面：88-97页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61888102 and 12274447) the National Key Research and Development Program of China(Grant Nos.2021YFA1202900 and 2023YFA1407000) the KeyArea Research and Development Program of Guangdong Province,China(Grant No.2020B0101340001) the Guangdong Major Project of Basic and Applied Basic Research(Grant No.2021B0301030002) the Strategic Priority Research Program of Chinese Academy of Sciences(CAS)(Grant No.XDB0470101) 

主　　题：quantum Inversion curvature 

摘      要：Hall effects have been the central paradigms in modern physics,materials science and practical applications,and have led to many exciting breakthroughs,including the discovery of topological Chern invariants and the revolution of metrological resistance *** date,the Hall effects have mainly focused on a single degree of freedom(Do F),and most of them require the breaking of spatial-inversion and/or time-reversal *** we demonstrate a new type of Hall effect,i.e.,layer-valley Hall effect,based on a combined layer-valley Do F characterized by the product of layer and valley *** layer-valley Hall effect has a quantum origin arising from the layer-valley contrasting Berry curvature,and can occur in nonmagnetic centrosymmetric crystals with both spatial-inversion and time-reversal symmetries,transcending the symmetry constraints of single Do F Hall effect based on the constituent layer or valley ***,the layer-valley Hall effect is highly tunable and shows a W-shaped pattern in response to the out-of-plane electric ***,we discuss the potential detection approaches and material-specific design principles of layer-valley Hall *** results demonstrate novel Hall physics and open up exotic paradigms for new research direction of layer-valleytronics that exploits the quantum nature of the coupled layer-valley DoF.