Ideal Weyl Semimetals
Jiawei Ruan1, Shao-Kai Jian2, Hong Yao2, Haijun Zhang1*, Shou-Cheng Zhang3, Dingyu Xing1
1Department of Physics, Nanjing University, Nanjing, China
2Institute for Advanced Study, Tsinghua University, Beijing, China
3Department of Physics, Stanford University, Stanford, USA
* presenting author:Haijun Zhang,
Ideal Weyl semimetals with all Weyl nodes exactly at the Fermi level and no coexisting with trivial Fermi surfaces in the bulk, similar to graphene, could feature deep and novel 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 the first 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.

Keywords: Topological materials, Weyl semimetals