Three-dimensional Dirac semimetal and quantum transport in Cd3As2

Zhijun Wang, Hongming Weng, Quansheng Wu, Xi Dai, and Zhong Fang
Phys. Rev. B 88, 125427 – Published 23 September 2013

Abstract

Based on the first-principles calculations, we recover the silent topological nature of Cd3As2, a well known semiconductor with high carrier mobility. We find that it is a symmetry-protected topological semimetal with a single pair of three-dimensional (3D) Dirac points in the bulk and nontrivial Fermi arcs on the surfaces. It can be driven into a topological insulator and a Weyl semimetal state by symmetry breaking, or into a quantum spin Hall insulator with a gap more than 100 meV by reducing dimensionality. We propose that the 3D Dirac cones in the bulk of Cd3As2 can support sizable linear quantum magnetoresistance even up to room temperature.

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  • Received 29 May 2013

DOI:https://doi.org/10.1103/PhysRevB.88.125427

©2013 American Physical Society

Authors & Affiliations

Zhijun Wang, Hongming Weng*, Quansheng Wu, Xi Dai, and Zhong Fang

  • Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • *hmweng@aphy.iphy.ac.cn
  • zfang@aphy.iphy.ac.cn

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Vol. 88, Iss. 12 — 15 September 2013

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