Tunable high spin Chern-number insulator phases in strained Sb monolayer

被引：0

作者：

Cook, Jacob ^{[1
]}

Yang, Po-Yuan ^{[2
]}

Volz, Theo ^{[3
]}

Conner, Clayton ^{[1
]}

Satterfield, Riley ^{[1
]}

Berglund, Joseph ^{[1
]}

Lu, Qiangsheng ^{[1
,4
]}

Moore, Rob G. ^{[4
]}

Yao, Yueh-Ting ^{[2
]}

Chang, Tay-Rong ^{[2
,5
,6
]}

Bian, Guang ^{[1
,7
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[3] Rock Bridge High Sch, Columbia, MO 65203 USA

[4] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[5] Ctr Quantum Frontiers Res & Technol QFort, Tainan 70101, Taiwan

[6] Natl Ctr Theoret Sci, Phys Div, Taipei 10617, Taiwan

[7] Univ Missouri, MU Mat Sci & Engn Inst, Columbia, MO 65211 USA

来源：

MATERIALS TODAY PHYSICS | 2025年 / 51卷

关键词：

High spin Chern-number insulator; Topological quantum chemistry; Molecular beam epitaxy; Sb monolayer;

D O I：

10.1016/j.mtphys.2025.101664

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. The HSCI phase with two pairs of gapless helical edge states is robust even in the presence of spin-orbit coupling due to the protection of a "hidden"feature spectrum topology. In this work, we report the observation of a semimetallic Sb monolayer carrying the same band topology as HSCI with the 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.

引用

页数：6

共 46 条

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