{
  "id": "2208.12800",
  "version": "v1",
  "published": "2022-08-26T17:49:44.000Z",
  "updated": "2022-08-26T17:49:44.000Z",
  "title": "Unified theory of spin and charge in a ferromagnet",
  "authors": [
    "Oleg Tchernyshyov"
  ],
  "comment": "Submitted to a special issue of J. Phys.: Condens. Matter on Quantum Solitons",
  "categories": [
    "cond-mat.mes-hall",
    "nlin.PS"
  ],
  "abstract": "We derive a unified theory of spin and charge degrees of freedom in a ferromagnet. The spin-transfer torque and spin emf are examined from the coarse-grained perspective of collective coordinates. The resulting equations of motion reflect a balance of conservative, gyroscopic (Berry-phase), and dissipative forces. We then expand the space of collective coordinates by adding the electric charge. The adiabatic spin-transfer torque and spin emf turn out to be a gyroscopic force; their nonadiabatic counterparts are a dissipative force.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-08-26T17:49:44.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "unified theory",
      "ferromagnet",
      "adiabatic spin-transfer torque",
      "dissipative force",
      "collective coordinates"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}