journal article·2019-10-01Open access

Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br

Zeji Wang, Shuyu Cheng, Tay-Rong Chang, Wenlong Ma, Xitong Xu, Huibin Zhou, Guangqiang Wang, Xin Gui, Haipeng Zhu, Zhen Zhu, Hao Zheng, Jinfeng Jia, Junfeng Wang, Weiwei Xie, Shuang Jia

APL Materials· Volume 7· Issue 10

Abstract

We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the kz direction. Our transport measurements on the single crystals show highly anisotropic, compensated low-density electrons and holes, both of which exhibit ultrahigh mobility at a level of 105 cm2 V−1 s−1 at low temperature. The highly mobile, compensated carriers lead a nonsaturated, parabolic magnetoresistance as large as 3 × 105 in single-crystalline AuTe2Br in a magnetic field up to 58 T.
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Research context

OpenAlex topics: Topological Materials and Phenomena · 2D Materials and Applications · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

ICQM, School of Physics, Peking University 1 , Beijing 100871, China

Institute of Materials, China Academy of Engineering Physics 2 , Jiangyou 621908, Sichuan, People’s Republic of China

Department of Physics, National Tsing Hua University 3 , Hsinchu, Taiwan

Department of Chemistry, Louisiana State University 4 , Baton Rouge, Louisiana 70803, USA

Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology 5 , Wuhan 430074, China

School of Physics and Astronomy, Shanghai Jiao Tong University 6 , Shanghai 200240, China

CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Science 7 , Beijing 100190, China

Kunshan Sunlaite New Energy Co., Ltd. 8 , Kunshan 215300, China

Funding

National Natural Science Foundation of China · National Key R&D Program of China · Key Research Program of the Chinese Academy of Science · National Science Foundation of Jiangsu Province of China · the MOST Grant for the Columbus Program

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