Two-dimensional topological materials discovery by symmetry-indicator method

Di Wang, Feng Tang, Jialin Ji, Wenqing Zhang, Ashvin Vishwanath, Hoi Chun Po, and Xiangang Wan
Phys. Rev. B 100, 195108 – Published 7 November 2019
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Abstract

Two-dimensional (2D) topological materials (TMs) have attracted tremendous attention due to the promise of revolutionary devices with nondissipative electric or spin currents. Unfortunately, the scarcity of 2D TMs holds back the experimental realization of such devices. In this work, based on our recently developed, highly efficient TM discovery algorithm using symmetry indicators, we explore the possible 2D TMs in all nonmagnetic compounds in four recently proposed materials databases for possible 2D materials. We identify hundreds of 2D TM candidates, including 205 topological (crystalline) insulators and 299 topological semimetals. In particular, we highlight MoS, with a mirror Chern number of −4, as a possible experimental platform for studying the interaction-induced modification to the topological classification of materials. Our results winnow out the topologically interesting 2D materials from these databases and provide a TM gene pool for further experimental studies.

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  • Received 8 June 2019
  • Revised 12 September 2019

DOI:https://doi.org/10.1103/PhysRevB.100.195108

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Di Wang1,2,*, Feng Tang1,2,*, Jialin Ji3, Wenqing Zhang4, Ashvin Vishwanath5, Hoi Chun Po6, and Xiangang Wan1,2,†

  • 1National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
  • 2Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • 3Materials Genome Institute, Shanghai University, Shanghai 200444, China
  • 4Department of Physics and Shenzhen Institute for Quantum Science & Technology, Southern University of Science and Technology, 1088 Xueyuan Road, Shenzhen, Guangdong 518055, China
  • 5Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
  • 6Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

  • *These authors contributed equally to this work.
  • Corresponding author: xgwan@nju.edu.cn

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Issue

Vol. 100, Iss. 19 — 15 November 2019

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