Tunable High Spin Chern-Number Insulator Phases in Strained Sb Monolayer
cond-mat.mtrl-sci
/ Authors
Jacob Cook, Po-Yuan Yang, Theo Volz, Clayton Conner, Riley Satterfield, Joseph Berglund, Qiangsheng Lu, Rob G. Moore, Yueh-Ting Yao, Tay-Rong Chang
and 1 more author
/ Abstract
High spin Chern-number insulators (HSCI) have emerged as a novel 2D topological phase of condensed matter that is beyond the classification of topological quantum chemistry. In this work, we report the observation of a semimetallic Sb monolayer carrying the same band topology as HSCI with a spin Chern number equal to 2. Our calculations further indicate a moderate lattice strain can make Sb monolayer an insulator or a semimetal with a tunable spin Chern number from 0 to 3. The results suggest strained Sb monolayers as a promising platform for exploring exotic properties of the HSCI topological matter.