{
  "id": "1910.00325",
  "version": "v1",
  "published": "2019-10-01T11:57:34.000Z",
  "updated": "2019-10-01T11:57:34.000Z",
  "title": "Independent excitations of the spin and orbital momenta in a single magnetic atom",
  "authors": [
    "R. Rejali",
    "D. Coffey",
    "J. Gobeil",
    "J. W. González",
    "F. Delgado",
    "A. F. Otte"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We use spin-polarized inelastic tunneling spectroscopy to probe the magnetic properties of single Fe atoms bound to the nitrogen sites of Cu$_2$N. We report a zero-field splitting of $18.4 \\pm 0.1$ meV---the largest reported for Fe adatoms on surfaces---which arises from a largely preserved orbital angular momentum. In addition to two distinct inelastic spin excitations, we observe an excitation of the orbital moment, which we describe in terms of a cotunneling mechanism. We explain these observations using density functional theory and multiplet calculations, accounting for the unquenched, anisotropic orbital moment.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-10-01T11:57:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "single magnetic atom",
      "orbital momenta",
      "independent excitations",
      "preserved orbital angular momentum",
      "distinct inelastic spin excitations"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}