Abstract
We study interaction effect of quantum spin Hall state in InAs/GaSb quantum wells under an in-plane magnetic field by using the self-consistent mean field theory. We construct a phase diagram as a function of intralayer and interlayer interactions, and identify two novel phases, a charge-/spin-density wave phase and an exciton condensate phase. The charge-/spin-density wave phase is topologically nontrivial with helical edge transport at the boundary, while the exciton condensate phase is topologically trivial. The Zeeman effect is strongly renormalized due to interaction in certain parameter regimes of the system, leading to a much smaller g factor, which may stabilize the helical edge transport.
| Original language | English (US) |
|---|---|
| Article number | 075130 |
| Journal | Physical Review B |
| Volume | 96 |
| Issue number | 7 |
| DOIs | |
| State | Published - Aug 15 2017 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Topological charge-density and spin-density waves in InAs/GaSb quantum wells under an in-plane magnetic field. / Hu, Lun Hui; Chen, Chih Chieh; Liu, Chao Xing; Zhang, Fu Chun; Zhou, Yi.
In: Physical Review B, Vol. 96, No. 7, 075130, 15.08.2017.Research output: Contribution to journal › Article
TY - JOUR
T1 - Topological charge-density and spin-density waves in InAs/GaSb quantum wells under an in-plane magnetic field
AU - Hu, Lun Hui
AU - Chen, Chih Chieh
AU - Liu, Chao Xing
AU - Zhang, Fu Chun
AU - Zhou, Yi
PY - 2017/8/15
Y1 - 2017/8/15
N2 - We study interaction effect of quantum spin Hall state in InAs/GaSb quantum wells under an in-plane magnetic field by using the self-consistent mean field theory. We construct a phase diagram as a function of intralayer and interlayer interactions, and identify two novel phases, a charge-/spin-density wave phase and an exciton condensate phase. The charge-/spin-density wave phase is topologically nontrivial with helical edge transport at the boundary, while the exciton condensate phase is topologically trivial. The Zeeman effect is strongly renormalized due to interaction in certain parameter regimes of the system, leading to a much smaller g factor, which may stabilize the helical edge transport.
AB - We study interaction effect of quantum spin Hall state in InAs/GaSb quantum wells under an in-plane magnetic field by using the self-consistent mean field theory. We construct a phase diagram as a function of intralayer and interlayer interactions, and identify two novel phases, a charge-/spin-density wave phase and an exciton condensate phase. The charge-/spin-density wave phase is topologically nontrivial with helical edge transport at the boundary, while the exciton condensate phase is topologically trivial. The Zeeman effect is strongly renormalized due to interaction in certain parameter regimes of the system, leading to a much smaller g factor, which may stabilize the helical edge transport.
UR - http://www.scopus.com/inward/record.url?scp=85028973858&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevB.96.075130
DO - 10.1103/PhysRevB.96.075130
M3 - Article
AN - SCOPUS:85028973858
VL - 96
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 7
M1 - 075130
ER -