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

Miguel A. Cazalilla^1*

¹Physics, National Tsing Hua University, Hsichu City, Taiwan

* Presenter:Miguel A. Cazalilla, email:miguel.cazalilla@gmail.com

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 antiresonances appear. When the chemical potential is on resonance, interaction effects broaden the antiresonance 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′ of WTe2 are briefly discussed.

Keywords: Luttinger liquids, Quantum Spin Hall Effect, Magnetic Impurities