Room-temperature third-order nonlinear Hall effect in Weyl semimetal TalrTe_(4)  

作　　者：Cong Wang Rui-Chun Xiao Huiying Liu Zhaowei Zhang Shen Lai Chao Zhu Hongbing Cai Naizhou Wang Shengyao Chen Ya Deng Zheng Liu Shengyuan A.Yang Wei-Bo Gao 

机构地区：[1]College of Mathematics and Physics,Beijing University of Chemical Technology,Beijing 100029,China [2]Division of Physics and Applied Physics,School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore 637371,Singapore [3]Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China [4]Research Laboratory for Quantum Materials,Singapore University of Technology and Design,Singapore 487372,Singapore [5]School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore [6]CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China [7]The Photonics Institute and Centre for Disruptive Photonic Technologies,Nanyang Technological University,Singapore 637371,Singapore

出　　处：《National Science Review》2022年第12期171-178,共8页国家科学评论（英文版）

基　　金：supported by the Singapore National Research Foundation through its Competitive Research Program(NRFCRP21-2018-0007 and NRF-CRP22-2019-0004);the Singapore Ministry of Education(MOE2016-T3-1-006(S),MOE2017-T2-2-108 and MOE2019-T2-1-001);Fundamental Research Funds for the Central Universities(buctrc202122);the National Natural Science Foundation of China(11947212).

摘　　要：The second-order nonlinear Hall effect observed in the time-revers al symmetric system has not only shown abundant physical content,but also exhibited potential application prospects.Recently,a third-order nonlinear Hall effect has been observed in MoTe_(2)and WTe_(2).However,few-layer MoTe_(2)and WTe_(2)are usually unstable in air and the observed third-order nonlinear Hall effect can be measured only at low temperature,which hinders further investigation as well as potential application.Thus,exploring new air-stable material systems with a sizable third-order nonlinear Hall effect at room temperature is an urgent task.Here,in type-ⅡWeyl semimetal TaIrTe_(4),we observed a pronounced third-order nonlinear Hall effect,which can exist at room temperature and remain stable for months.The third-order nonlinear Hall effect is connected to the Berry-connection polarizability tensor instead of the Berry curvature.The possible me chanism of the observation of the third-order nonlinear Hall effe ct in TaIrTe_(4)at room temperature has been discussed.Our findings will open an avenue towards exploring room-temperature nonlinear devices in new quantum materials.

关 键 词：topological material third-order nonlinear Hall effect room temperature Berry connection polarizability tensor 

分 类 号：O469[理学—凝聚态物理]