{
  "id": "0804.0591",
  "version": "v2",
  "published": "2008-04-03T17:27:07.000Z",
  "updated": "2008-10-22T12:10:21.000Z",
  "title": "Multiple Andreev reflections in a quantum dot coupled to superconductors: Effects of spin-orbit coupling",
  "authors": [
    "Fabrizio Dolcini",
    "Luca Dell'Anna"
  ],
  "comment": "Final version published in Phys. Rev. B. (typos corrected; more details specified in the text and in the abstract; color scale of Fig.9 improved)",
  "journal": "Phys. Rev. B 78, 024518 (2008)",
  "doi": "10.1103/PhysRevB.78.024518",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con"
  ],
  "abstract": "We study the out-of-equilibrium current through a multilevel quantum dot contacted to two superconducting leads and in the presence of Rashba and Dresselhaus spin-orbit couplings, in the regime of strong dot-lead coupling. The multiple Andreev reflection (MAR) subgap peaks in the current voltage characteristics are found to be modified (but not suppressed) by the spin-orbit interaction, in a way that strongly depends on the shape of the dot confining potential. In a perfectly isotropic dot the MAR peaks are enhanced when the strength $\\alpha_R$ and $\\alpha_D$ of Rashba and Dresselhaus terms are equal. When the anisotropy of the dot confining potential increases the dependence of the subgap structure on the spin-orbit angle $\\theta=\\arctan(\\alpha_D/\\alpha_R)$ decreases. Furthermore, when an in-plane magnetic field is applied to a strongly anisotropic dot, the peaks of the non-linear conductance oscillate as a function of the magnetic field angle, and the location of the maxima and minima allows for a straightforward read-out of the spin-orbit angle $\\theta$.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-10-22T12:10:21.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "74.50.+r",
      "73.23.-b",
      "74.45.+c",
      "71.70.Ej"
    ],
    "keywords": [
      "multiple andreev reflection",
      "quantum dot",
      "spin-orbit coupling",
      "superconductors",
      "spin-orbit angle"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Jul",
      "volume": 78,
      "number": 2,
      "pages": "024518"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..78b4518D"
    }
  }
}