Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling

Shuichi Murakami
Phys. Rev. Lett. 97, 236805 – Published 6 December 2006

Abstract

We show that the spin-Hall conductivity in insulators is related to a magnetic susceptibility representing the strength of the spin-orbit coupling. We use this relationship as a guiding principle to search real materials showing quantum spin-Hall effect. As a result, we theoretically predict that two-dimensional bismuth will show the quantum spin-Hall effect, both by calculating the helical edge states, and by showing the nontriviality of the Z2 topological number, and propose possible experiments.

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  • Received 22 June 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.236805

©2006 American Physical Society

Authors & Affiliations

Shuichi Murakami*

  • Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

  • *Electronic address: murakami@appi.t.u-tokyo.ac.jp

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Issue

Vol. 97, Iss. 23 — 8 December 2006

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