title: Spin-charge separation in the quantum spin Hall state.
abstract: 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.
authors.affiliation: Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA.
authors.forename: Xiao-Liang
authors.initials: XL
authors.lastname: Qi
authors.forename: Shou-Cheng
authors.initials: SC
authors.lastname: Zhang