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】

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