Topological crystalline Kondo insulators and universal topological surface states of SmB$_6$

Mengxing Ye; J. W. Allen; Kai Sun

paper

Topological crystalline Kondo insulators and universal topological surface states of SmB $_{6}$

arXiv:1307.7191

Abstract

We prove theoretically that certain strongly correlated Kondo insulators are topological crystalline insulators with nontrivial topology protected by crystal symmetries. In particular, we find that SmB $_{6}$ is such a material. In addition to a nontrivial Z $_{2}$ topological index protected by time reversal symmetry, SmB $_{6}$ also has nontrival mirror Chern numbers protected by mirror symmetries. On the $(100)$ surface of SmB $_{6}$ , the nontrivial mirror Chern numbers do not generate additional surface states beyond those predicted by the Z $_{2}$ topological index. However, on the $(110)$ surface, two more surface Dirac points are predicted. Remarkably, we find that for SmB $_{6}$ both the Z $_{2}$ topological index and the mirror Chern numbers are independent of microscopic details, which enables us to obtain surface state properties that are universal.

arXiv comment4 pages + 3 pages Supplementary Information, 3 figures

Cited by in corpus (1)

Surface and electronic structure of SmB $_{6}$ through Scanning Tunneling Microscopy

Topological crystalline Kondo insulators and universal topological surface states of SmB6​

Abstract

Cited by in corpus (1)

Topological crystalline Kondo insulators and universal topological surface states of SmB $_{6}$