Bi<sub>4</sub>X<sub>4 </sub>(X= Br, I)-Based High-Temperature Quantum Spin Hall Physics

ORAL

Abstract

The manifestation of quantum phenomena at room temperatures is a major challenge but also a major goal in physics, and this is particularly true for the quantum spin Hall effect. Here we report the theoretical demonstration of high-temperature quantum spin Hall systems based on Bi4X4 (X= Br, I), a rare higher-order topological insulators identified recently. We further investigate their behavior under external electric field. We also comment on the key experimental studies.

*We acknowledge the Texas Advanced Computing Center (TACC) for providing resources that have contributed to the research results reported in this work. We acknowledge support by the Army Research Office under grant number W911NF-18-1-0416 and by the National Science Foundation under grant numbers DMR-1945351 through the CAREER program, DMR-1921581 through the DMREF program, and DMR-2105139 through the CMP program.

–

Presenters

  • Chiho Yoon

    • University of Texas at Dallas
    • Seoul Natl Univ

Authors

  • Chiho Yoon

    • University of Texas at Dallas
    • Seoul Natl Univ

  • Yanfeng Zhou

    • University of Texas at Dallas

  • Hongki Min

    • Seoul Natl Univ

  • Fan Zhang

    • The University of Texas at Dallas
    • UT Dallas