2010/06/30 by Kentaro Nomura, Naoto Nagaosa · 4 citations
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electric field #Ferromagnetism #Gapless playback #Geometry #Graphene research and applications #Insulator (electricity) #Magnetic field #Magnetism #Mathematics #Mechanics #Optoelectronics #Physics #Quantum mechanics #Surface (topology) #Surface states #Thermal #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #Vortex #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.82.161401
published as Phys. Rev. B82:161401,2010 · 5 pages, 2 figures
openalex publication_date 2010/10/01 · arxiv created 2010/10/15 · arxiv updated 2014/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.