In-plane magnetic field induced density wave states near quantum spin Hall phase transitions

Abstract

We study the influence of an in-plane magnetic field and Coulomb interactions on the physics of quantum spin Hall insulators, like those in InAs/GaSb and HgTe/CdTe quantum wells. Using a Hartree-Fock mean-field theory approximation, we calculate phase diagrams as functions of the band gap, band hybridization, and magnetic field strength. We show that when the band hybridization is weak, the system is unstable against the formation of density wave states. As the strength of the in-plane magnetic field increases, the density-wave region of the phase diagram expands and distinct density-wave states appear. We discuss possible experimental implications of our results.

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Cited by in corpus (7)

• Colloquium: Quantum anomalous Hall effect
• Two-dimensional topological insulator state in cadmium arsenide thin films
• Zeeman field-induced two-dimensional Weyl semimetal phase in cadmium arsenide
• Keldysh field theory of dynamical exciton condensation transitions in nonequilibrium electron-hole bilayers
• Interplay of quantum spin Hall effect and spontaneous time-reversal symmetry breaking in electron-hole bilayers I: Transport properties
• Interplay of quantum spin Hall effect and spontaneous time-reversal symmetry breaking in electron-hole bilayers II: Zero-field topological superconductivity
• Magneto-Induced Topological Phase Transition in Inverted InAs/GaSb Bilayers