{
  "id": "1912.03797",
  "version": "v1",
  "published": "2019-12-09T00:45:08.000Z",
  "updated": "2019-12-09T00:45:08.000Z",
  "title": "Generation of dc, ac, and second-harmonic spin currents by electromagnetic fields in an inversion-asymmetric antiferromagnet",
  "authors": [
    "Tatsuhiko N. Ikeda"
  ],
  "comment": "8 pages, 6 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.str-el"
  ],
  "abstract": "Manipulating spin currents in magnetic insulators is a key technology in spintronics. We theoretically study a simple inversion-asymmetric model of quantum antiferromagnets, where both the exchange interaction and the magnetic field are staggered. We calculate spin currents generated by external electric and magnetic fields by using a quantum master equation. We show that an ac electric field with amplitude $E_0$ leads, through exchange-interaction modulation, to the dc and second-harmonic spin currents proportional to $E_0^2$. We also show that dc and ac staggered magnetic fields $B_0$ generate the dc and ac spin currents proportional to $B_0$, respectively. We elucidate the mechanism by an exactly solvable model, and thereby propose the ways of spin current manipulation by electromagnetic fields.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-12-09T00:45:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "electromagnetic fields",
      "inversion-asymmetric antiferromagnet",
      "generation",
      "second-harmonic spin currents proportional",
      "ac spin currents proportional"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}