Time-reversal-symmetry-broken quantum spin Hall effect

Details Time-reversal-symmetry-broken quantum spin Hall effect Time-reversal-symmetry-broken quantum spin Hall effect

2011-03-23

arxiv.org/abs/1103.4473v2

Phys. Rev. Lett. 107, 066602 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.107.066602

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 Rashba spin-orbit coupling and an exchange field, which break both inversion and TR symmetries. It is found that the QSH state characterized by nonzero spin Chern numbers $C_{\pm}=\pm 1$ persists when the TR symmetry is broken. A topological phase transition from the TR symmetry-broken QSH phase to a quantum anomalous Hall phase occurs at a critical exchange field, where the bulk band gap just closes. It is also shown that the transition from the TR symmetry-broken QSH phase to an ordinary insulator state can not happen without closing the band gap.

Affiliated with

Also associated with

No associations

Rating

Time-reversal-symmetry-broken quantum spin Hall effect does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Time-reversal-symmetry-broken quantum spin Hall effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-reversal-symmetry-broken quantum spin Hall effect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-440894