{
  "id": "1804.00127",
  "version": "v2",
  "published": "2018-03-31T06:39:15.000Z",
  "updated": "2018-09-28T09:08:09.000Z",
  "title": "Understanding current-driven dynamics of magnetic domain walls in spin-orbit systems",
  "authors": [
    "Mei Li",
    "Jianbo Wang",
    "Jie Lu"
  ],
  "comment": "11 pages, 4 figure",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "In this work, systematic one-dimensional (1D) analyses are performed to understand current-driven domain-wall dynamics in heavy metal/ferromagnetic metal/oxide trilayers with spin-orbit torques (SOTs) originating from various mechanisms. For SOTs induced by Rashba spin-orbit interaction or spin Hall effect, in 1D collective-coordinate-model framework the Walker breakdown suppression is analytically explained in the presence of fieldlike (FL) SOTs with effective fields along $\\mathbf{e}_z\\times\\hat{\\mathbf{J}}_e$ ($\\mathbf{e}_z$ being the interface normal and $\\hat{\\mathbf{J}}_e$ being the charge current direction). While the wall mobility (velocity versus current density) change and even motion-direction reversal (from forward to backward of electron flow) as well as its polarity sensitivity can be well explicated only if the anti-damping-like (ADL) SOT is introduced. When bulk inversion asymmetry or strain induced FL-SOTs with effective fields along general transverse orientation are further considered, asymptotic expansions on dynamical equation reveal that the mobility change still can not happen without the help of ADL-SOTs. This also holds for external uniform transverse magnetic fields with general orientations.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2018-09-28T09:08:09.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic domain walls",
      "understanding current-driven dynamics",
      "spin-orbit systems",
      "external uniform transverse magnetic fields",
      "understand current-driven domain-wall dynamics"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}