Symmetry-protected ideal Weyl semimetal in HgTe-class materials

Jiawei Ruan, Shao-Kai Jian, Hong Yao (), Haijun Zhang (), Shou-Cheng Zhang and Dingyu Xing
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Jiawei Ruan: National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Shao-Kai Jian: Institute for Advanced Study, Tsinghua University
Hong Yao: Institute for Advanced Study, Tsinghua University
Haijun Zhang: National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Shou-Cheng Zhang: Stanford University
Dingyu Xing: National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract Ideal Weyl semimetals with all Weyl nodes exactly at the Fermi level and no coexisting trivial Fermi surfaces in the bulk, similar to graphene, could feature deep physics such as exotic transport phenomena induced by the chiral anomaly. Here, we show that HgTe and half-Heusler compounds, under a broad range of in-plane compressive strain, could be materials in nature realizing ideal Weyl semimetals with four pairs of Weyl nodes and topological surface Fermi arcs. Generically, we find that the HgTe-class materials with nontrivial band inversion and noncentrosymmetry provide a promising arena to realize ideal Weyl semimetals. Such ideal Weyl semimetals could further provide a unique platform to study emergent phenomena such as the interplay between ideal Weyl fermions and superconductivity in the half-Heusler compound LaPtBi.

Date: 2016
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DOI: 10.1038/ncomms11136

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