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Tunable High Spin Chern-Number Insulator Phases in Strained Sb Monolayer

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arxiv 2312.02316 v2 pith:VUGKWXIL submitted 2023-12-04 cond-mat.mtrl-sci cond-mat.mes-hall

Jacob Cook , Po-Yuan Yang , Theo Volz , Clayton Conner , Riley Satterfield , Joseph Berglund , Qiangsheng Lu , Rob G. Moore
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Yueh-Ting Yao Tay-Rong Chang Guang Bian
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classification cond-mat.mtrl-scicond-mat.mes-hall
keywords spinhscimonolayertopologicalchernchern-numberhighinsulator
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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.

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