Time-reversal-invariant topological superconductivity in n-doped BiH

Fan Yang, Cheng-Cheng Liu, Yu-Zhong Zhang, Yugui Yao, and Dung-Hai Lee
Phys. Rev. B 91, 134514 – Published 23 April 2015

Abstract

Despite intense interest and considerable works, definitive experimental evidence for time-reversal-invariant topological superconductivity is still lacking. Hence searching for such superconductivity in real materials remains one of the main challenges in the field of topological material. Previously it has been shown that in the buckled honeycomb lattice structure, hydrogenated single bilayer Bi, namely BiH, is a topological insulator. Here we predict that upon n-type doping, BiH is a time-reversal-invariant topological superconductor. Interestingly the edge states of such a superconductor consist of both helical complex fermion modes and helical Majorana fermion modes.

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  • Received 5 January 2015
  • Revised 3 April 2015

DOI:https://doi.org/10.1103/PhysRevB.91.134514

©2015 American Physical Society

Authors & Affiliations

Fan Yang1,*, Cheng-Cheng Liu1, Yu-Zhong Zhang2, Yugui Yao1,†, and Dung-Hai Lee3,4

  • 1School of Physics, Beijing Institute of Technology, Beijing 100081, China
  • 2Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • 3Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
  • 4Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • *yangfan_blg@bit.edu.cn
  • ygyao@bit.edu.cn

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Issue

Vol. 91, Iss. 13 — 1 April 2015

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