Current-Driven Magnetization Reversal in Orbital Chern Insulators

Chunli Huang, Nemin Wei, Allan H. Macdonald

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Graphene multilayers with flat moiré minibands can exhibit the quantized anomalous Hall effect due to the combined influence of spontaneous valley polarization and topologically nontrivial valley-projected bands. The sign of the Hall effect in these Chern insulators can be reversed either by applying an external magnetic field, or by driving a transport current through the system. We propose a current-driven mechanism whereby reversal occurs along lines in the (current I, magnetic-field B) control parameter space with slope dI/dB=(e/h)MAM(1-γ2)/γ, where M is the magnetization, AM is the moiré unit cell area, and γ<1 is the ratio of the chemical potential difference between valleys along a domain wall to the electrical bias eV.

Original languageEnglish
Article number056801
JournalPhysical Review Letters
Issue number5
StatePublished - Feb 2 2021

Bibliographical note

Publisher Copyright:
© 2021 American Physical Society.

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Current-Driven Magnetization Reversal in Orbital Chern Insulators'. Together they form a unique fingerprint.

Cite this