Spin-charge separation in the quantum spin Hall state.
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.
Qi
Xiao-Liang
XL
Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA.
Zhang
Shou-Cheng
SC