{
  "id": "cond-mat/0306418",
  "version": "v1",
  "published": "2003-06-16T22:09:33.000Z",
  "updated": "2003-06-16T22:09:33.000Z",
  "title": "Singlet-Triplet Transition in lateral Quantum Dots: A Numerical Renormalization Group Study",
  "authors": [
    "W. Hofstetter",
    "G. Zarand"
  ],
  "comment": "9 pages Revtex, 10 eps figures",
  "journal": "Phys. Rev. B 69, 235301 (2004)",
  "doi": "10.1103/PhysRevB.69.235301",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We discuss transport through a lateral quantum dot in the vicinity of a singlet-triplet spin transition in its ground state. Extracting the scattering phase shifts from the numerical renormalization group spectra, we determine the linear conductance at zero temperature as a function of a Zeeman field and the splitting of the singlet and triplet states. We find reduced low-energy transport, and a non-monotonic magnetic field dependence both in the singlet and the triplet regime. For a generic set of dot parameters and no Zeeman splitting, the singlet-triplet transition may be identified with the conductance maximum. The conductance is least sensitive to the magnetic field in the region of the transition, where it decreases upon application of a magnetic field. Our results are in good agreement with recent experimental data.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-06-16T22:09:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "lateral quantum dot",
      "numerical renormalization group study",
      "singlet-triplet transition",
      "non-monotonic magnetic field dependence",
      "singlet-triplet spin transition"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}