Three-dimensional Dirac semimetal and quantum transport in Cd3As2

By Zhijun Wang, H. Weng, Quansheng Wu, X. Dai, Z. Fang. 2013

1,201 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/9c7605d14a31eee2c067f6fce6365d6aa3b43b10

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

Colloquium : Topological band theory (2016, background): “Wang, E., H. Ding, A. V. Fedorov, W. Yao, Z. Li, Y.- F. Lv, K. Zhao, et al., 2013, “Fully Gapped Topological Surface States in Bi2Se3 Films Induced by a D-Wave High-Temperature Superconductor,” Nat.”
Observation of Weyl nodes in TaAs (2015, background): “The Dirac fermion quasiparticle has recently been revealed to be stable under the protection of some crystal symmetry in topological Dirac semimetals such as Na3Bi [4] and Cd3As2 [5].”
Pressure-induced superconductivity in the three-dimensional topological Dirac semimetal Cd3As2 (2016, methodology): “28,29 By symmetry breaking, this 3D Dirac semimetal may be driven to a topological insulator or Weyl semimetal.(23) More interestingly, it was predicted that topological superconductivity may be achieved in Cd3As2 by carrier doping, 23”
Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd3As2. (2014, methodology): “Band calculations [5] and a recent STM study [13] reveal Dirac nodes at (0, 0,±kD) with kD ∼ 0.”
Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal candidate NbP (2015, background): “Two copies of WSM may constitute a Dirac semimetal [12, 13] if time-reversal and inversion symmetries are respected.”