Nontrivial interplay of strong disorder and interactions in quantum spin-Hall insulators doped with dilute magnetic impurities

Abstract

We investigate nonperturbatively the effect of a magnetic dopant impurity on the edge transport of a quantum spin Hall (QSH) insulator. We show that for a strongly coupled magnetic dopant located near the edge of a system, a pair of transmission anti-resonances appear. When the chemical potential is on resonance, interaction effects broaden the anti-resonance width with decreasing temperature, thus suppressing transport for both repulsive and moderately attractive interactions. Consequences for the recently observed QSH insulating phase of the $1$-T${}^{\prime }$ of WTe${}_2$ are briefly discussed.

14 (This version is the published one)

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Cited by in corpus (18)

• Failure of conductance quantization in two-dimensional topological insulators due to non-magnetic impurities
• Quasicrystalline Chern Insulators
• Helical Liquids in Semiconductors
• Conductance of quantum spin Hall edge states from first principles: the critical role of magnetic impurities and inter-edge scattering
• Spin and Charge Transport of Multi-Orbital Quantum Spin Hall Insulators
• Interaction-enhanced integer quantum Hall effect in disordered systems
• Scattering of magnons at graphene quantum-Hall-magnet junctions
• Topological insulator ring with magnetic impurities
• Breakdown of topological protection due to non-magnetic edge disorder in two-dimensional materials in the Quantum Spin Hall phase
• Spontaneous breaking of time-reversal symmetry at the edges of 1T' monolayer transition metal dichalcogenides
• Suppression of ballistic helical transport by isotropic dynamical magnetic impurities
• Robustness of Helical Edge States Under Edge Reconstruction
• The effect of magnetic impurity scattering on transport in topological insulators
• Two-channel Kondo problem in coupled interacting helical liquids
• Interaction- and phonon-induced topological phase transitions in double helical liquids
• In-gap states of magnetic impurity in quantum spin Hall insulator proximitized to a superconductor
• Natural orbitals renormalization group approach to a spin-1/2 impurity interacting with two helical liquids
• Edge Reconstruction in a Quantum Spin Hall Insulator