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

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

2006-06-30

arxiv.org/abs/cond-mat/0607001v2

Phys. Rev. Lett. 97, 236805 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.97.236805

We show that the spin Hall conductivity in insulators is related with 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 bismuth will show the quantum spin Hall effect, both by calculating the helical edge states, and by showing the non-triviality of the Z_2 topological number, and propose possible experiments.

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