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Spin-Charge Separation in the Quantum Spin Hall State

2008; American Physical Society; Volume: 101; Issue: 8 Linguagem: Inglês

10.1103/physrevlett.101.086802

1092-0145

Xiao-Liang Qi, Shoucheng Zhang,

Graphene research and applications

The quantum spin Hall state is a topologically nontrivial insulator state protected by the time-reversal symmetry. We show that such a state always leads to spin-charge separation in the presence of a pi flux. Our result is generally valid for any interacting system. We present a proposal to experimentally observe the phenomenon of spin-charge separation in the recently discovered quantum spin Hall system.