{
  "id": "1008.5103",
  "version": "v2",
  "published": "2010-08-30T16:02:08.000Z",
  "updated": "2011-05-31T16:21:29.000Z",
  "title": "Gate-tunable split Kondo effect in a carbon nanotube quantum dot",
  "authors": [
    "A. Eichler",
    "M. Weiss",
    "C. Schönenberger"
  ],
  "comment": "12 pages, 4 figures, published version",
  "journal": "Nanotechnology 22, 265204 (2011)",
  "doi": "10.1088/0957-4484/22/26/265204",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We show a detailed investigation of the split Kondo effect in a carbon nanotube quantum dot with multiple gate electrodes. It is found that the splitting decreases for increasing magnetic field, to result in a recovered zero-bias Kondo resonance at finite magnetic field. Surprisingly, in the same charge state, but under different gate-configurations, the splitting does not disappear for any value of the magnetic field, but we observe an avoided crossing of two high-conductance lines. We think that our observations can be understood in terms of a two-impurity Kondo effect with two spins coupled antiferromagnetically. The exchange coupling between the two spins can be influenced by a local gate, and the non-recovery of the Kondo resonance for certain gate configurations is explained by the existence of a small antisymmetric contribution to the exchange interaction between the two spins.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-05-31T16:21:29.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "carbon nanotube quantum dot",
      "gate-tunable split kondo effect",
      "magnetic field",
      "zero-bias kondo resonance"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Nanotechnology",
      "year": 2011,
      "month": "Jul",
      "volume": 22,
      "number": 26,
      "pages": 265204
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011Nanot..22z5204E"
    }
  }
}