Three-dimensional fractional topological insulators in coupled Rashba layers | |
Article | |
关键词: PERSISTENT SPIN HELIX; HGTE QUANTUM-WELLS; MAGNETIC-FIELDS; PHASE; GRAPHENE; | |
DOI : 10.1103/PhysRevB.96.085422 | |
来源: SCIE |
【 摘 要 】
We propose a model of three-dimensional topological insulators consisting of weakly coupled electron-and hole-gas layers with Rashba spin-orbit interaction stacked along a given axis. We show that in the presence of strong electron-electron interactions the system realizes a fractional strong topological insulator, where the rotational symmetry and condensation energy arguments still allow us to treat the problem as quasi-one-dimensional with bosonization techniques. We also show that if Rashba and Dresselhaus spin-orbit interaction terms are equally strong, by doping the system with magnetic impurities, one can bring it into the Weyl semimetal phase.
【 授权许可】
Free