{
  "id": "0903.2685",
  "version": "v2",
  "published": "2009-03-16T02:51:57.000Z",
  "updated": "2009-06-01T06:04:46.000Z",
  "title": "Quantum phase transition and underscreened Kondo effect in electron transport through parallel double quantum dots",
  "authors": [
    "Guo-Hui Ding",
    "Fei Ye",
    "Bing Dong"
  ],
  "comment": "5 pages, 5 figures, references added",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate electronic transport through parallel double quantum dot(DQD) system with strong on-site Coulomb interaction and capacitive interdot coupling. By applying numerical renormalization group(NRG) method, the ground state of the system and the transmission probability at zero temperature have been obtained. For a system of quantum dots with degenerate energy levels and small interdot tunnel coupling, the spin correlations between the DQDs is ferromagnetic, and the ground state of the system is a spin 1 triplet state. The linear conductance will reach the unitary limit ($2e^2/h$) due to the underscreened Kondo effect at low temperature. As the interdot tunnel coupling increases, there is a quantum phase transition from ferromagnetic to anti-ferromagnetic spin correlation in DQDs and the linear conductance is strongly suppressed.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-06-01T06:04:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "parallel double quantum dot",
      "quantum phase transition",
      "underscreened kondo effect",
      "electron transport",
      "strong on-site coulomb interaction"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0953-8984/21/45/455303",
      "journal": "Journal of Physics Condensed Matter",
      "year": 2009,
      "month": "Nov",
      "volume": 21,
      "number": 45,
      "pages": 455303
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009JPCM...21S5303D"
    }
  }
}