Electric charging of magnetic textures on the surface of a topological insulator

Kentaro Nomura, Naoto Nagaosa

Research output: Contribution to journalArticlepeer-review

103 Citations (Scopus)

Abstract

A three-dimensional topological insulator manifests gapless surface modes, described by two-dimensional Dirac equation. We study magnetic textures, such as domain walls and vortices, in a ferromagnetic thin film deposited on a three-dimensional topological insulator. It is shown that these textures can be electrically charged, ascribed to the proximity effect with the Dirac surface states. We derive a general relation between the electric and the magnetic charges. As a physical consequence, we discuss domain-wall motion driven by an applied electric field, which promises magnetic devices with high thermal efficiency.

Original languageEnglish
Article number161401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number16
DOIs
Publication statusPublished - 2010 Oct 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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