3 papers
cond-mat.mes-hall2012
Kosterlitz-Thouless transition in disordered two-dimensional topological insulators
Zhong Xu, L. Sheng, R. Shen +2
The disorder-driven metal-insulator transition in the quantum spin Hall systems is studied by scaling analysis of the Thouless conductance . Below a critical disorder strength,…
cond-mat.mes-hall2011
Topologically Protected Extended States in Disordered Quantum Spin-Hall Systems without Time-Reversal Symmetry
Zhong Xu, L. Sheng, D. Y. Xing +2
We demonstrate the existence of robust bulk extended states in the disordered Kane-Mele model with vertical and horizontal Zeeman fields, in the presence of a large Rashba coupling…
cond-mat.mes-hall2011
Time-reversal-symmetry-broken quantum spin Hall effect
Yunyou Yang, Zhong Xu, L. Sheng +3
Quantum spin Hall (QSH) state of matter is usually considered to be protected by time-reversal (TR) symmetry. We investigate the fate of the QSH effect in the presence of the Rashb…