Electrically-driven domain wall motion in quantum anomalous hall states

Sehoon Kim, Daichi Kurebayashi, Kentaro Nomura

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We theoretically study domain wall motion induced by an electric field in the quantum anomalous Hall states on a two-dimensional Kagome lattice with ferromagnetic order and spin–orbit coupling. We show that an electric charge is accumulated near the domain wall which indicates that the electric field drives both the accumulated charge and the domain wall with small energy dissipation. Using the linear response theory we compute the non-equilibrium spin density which exerts a non-adiabatic spin transfer torque on textures of the local magnetization. This torque emerges even when the bulk is insulating and does not require the longitudinal electric current. Finally, we estimate the velocity of domain wall motion in this system, which is faster than that in conventional metals.

Original languageEnglish
Article number083704
Journaljournal of the physical society of japan
Volume88
Issue number8
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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