Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
Shuichi Murakami
Abstract
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 Z2 topological number, and propose possible experiments.
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