{
  "id": "1210.4741",
  "version": "v1",
  "published": "2012-10-17T13:47:39.000Z",
  "updated": "2012-10-17T13:47:39.000Z",
  "title": "Conductance of single-atom magnetic junctions: A first-principles study",
  "authors": [
    "Yi-qun Xie",
    "Qiang Li",
    "Lei Huang",
    "Xiang Ye",
    "San-Huang Ke"
  ],
  "comment": "4 pages, 4 figures",
  "journal": "Appl. Phys. Lett. 101, 192408 (2012)",
  "doi": "10.1063/1.4766733",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We present a first-principles investigation to show that the contact conductance of a half conductance quantum ($G_0/2$) found previously does not generally hold for single-atom magnetic junctions composed of a tip and an adatom dsorbed on a surface. The contact conductance of the Ni-Co/Co(111) junction is approximately $G_0/2$, while for the Co-Co/Co(111), Ni-Ni/Ni(111), and Ni-Ni/Ni(001) junctions the contact conductances are 0.80$G_0$, 1.55$G_0$, and 1.77$G_0$, respectively. The deviation from $G_0/2$ is mainly caused by the variation of the spin-down conductance largely determined by the minority $d$ orbitals, as the spin-up one changes little for different junctions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-10-17T13:47:39.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.40.Jn",
      "68.43.-h",
      "71.15.-m",
      "71.20.Gj"
    ],
    "keywords": [
      "first-principles study",
      "contact conductance",
      "half conductance quantum",
      "single-atom magnetic junctions",
      "first-principles investigation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Applied Physics Letters",
      "year": 2012,
      "month": "Nov",
      "volume": 101,
      "number": 19,
      "pages": 192408
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012ApPhL.101s2408X"
    }
  }
}