{
  "id": "1003.3769",
  "version": "v1",
  "published": "2010-03-19T11:14:02.000Z",
  "updated": "2010-03-19T11:14:02.000Z",
  "title": "Dynamics of magnetization on the topological surface",
  "authors": [
    "Takehito Yokoyama",
    "Jiadong Zang",
    "Naoto Nagaosa"
  ],
  "comment": "4+ pages, 1 figure",
  "journal": "Phys. Rev. B 81, 241410(R) (2010)",
  "doi": "10.1103/PhysRevB.81.241410",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate theoretically the dynamics of magnetization coupled to the surface Dirac fermions of a three dimensional topological insulator, by deriving the Landau-Lifshitz-Gilbert (LLG) equation in the presence of charge current. Both the inverse spin-Galvanic effect and the Gilbert damping coefficient $\\alpha$ are related to the two-dimensional diagonal conductivity $\\sigma_{xx}$ of the Dirac fermion, while the Berry phase of the ferromagnetic moment to the Hall conductivity $\\sigma_{xy}$. The spin transfer torque and the so-called $\\beta$-terms are shown to be negligibly small. Anomalous behaviors in various phenomena including the ferromagnetic resonance are predicted in terms of this LLG equation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-03-19T11:14:02.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Nq",
      "85.75.-d",
      "72.25.Dc"
    ],
    "keywords": [
      "topological surface",
      "magnetization",
      "surface dirac fermions",
      "spin transfer torque",
      "inverse spin-galvanic effect"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2010,
      "month": "Jun",
      "volume": 81,
      "number": 24,
      "pages": 241410
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 849809,
      "adsabs": "2010PhRvB..81x1410Y"
    }
  }
}