{
  "id": "1506.07807",
  "version": "v1",
  "published": "2015-06-25T16:15:19.000Z",
  "updated": "2015-06-25T16:15:19.000Z",
  "title": "Interplay between Orbital Magnetic Moment and Crystal Field Symmetry: Fe atoms on MgO",
  "authors": [
    "S. Baumann",
    "F. Donati",
    "S. Stepanow",
    "S. Rusponi",
    "W. Paul",
    "S. Gangopadhyay",
    "I. G. Rau",
    "G. E. Pacchioni",
    "L. Gragnaniello",
    "M. Pivetta",
    "J. Dreiser",
    "C. Piamonteze",
    "C. P. Lutz",
    "R. M. Macfarlane",
    "B. A. Jones",
    "P. Gambardella",
    "A. J. Heinrich",
    "H. Brune"
  ],
  "comment": "6 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We combine density functional theory, x-ray magnetic circular dichroism, multiplet calculations, and scanning tunneling spectroscopy to assess the magnetic properties of Fe atoms adsorbed on a thin layer of MgO(100) on Ag(100). Despite the strong axial field due to the O ligand, the weak cubic field induced by the four-fold coordination to Mg atoms entirely quenches the first order orbital moment. This is in marked contrast to Co, which has an out-of-plane orbital moment of $L_z = \\pm 3$ that is protected from mixing in a cubic ligand field. The spin-orbit interaction restores a large fraction of the Fe orbital moment leading a zero-field splitting of $14.0 \\pm 0.3$~meV, the largest value reported for surface adsorbed Fe atoms.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-06-25T16:15:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "crystal field symmetry",
      "orbital magnetic moment",
      "fe atoms",
      "x-ray magnetic circular dichroism",
      "first order orbital moment"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}