{
  "id": "1608.02144",
  "version": "v1",
  "published": "2016-08-06T18:57:37.000Z",
  "updated": "2016-08-06T18:57:37.000Z",
  "title": "Shot Noise of Charge and Spin Current of a Quantum Dot Coupled to Semiconductor Electrodes",
  "authors": [
    "Zahra Sartipi",
    "Javad Vahedi"
  ],
  "comment": "10 pages, 10 figures",
  "journal": "The Journal of Physical Chemistry A 119, 10399 (2015)",
  "doi": "10.1021/acs.jpca.5b06360",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Based on the scattering matrix theory and non-equilibrium green function method, we have investigated the fluctuations of charge and spin current of the systems which consists of a quantum dot (QD) with a resonant level coupled to two semiconductor contacts within in alternative site $(AS)$ and alternative bond $(AB)$ framework, where two transverse $(B_x)$ and longitudinal $(B_z)$ magnetic fields are applied to the QD. It is only necessary to use the auto-correlation function to characterize the fluctuations of charge current for a two-terminal system because of the relation which is defined as $\\sum_{\\alpha}^e S_{\\alpha\\beta}$ = $\\sum_{\\beta}^e S_{\\alpha\\beta}=0$. Our result shows that both auto-shot noise $(S_{LL})$ and cross-shot noise $(S_{LR})$ are essential to characterize the fluctuations of spin current when $B_x$ is present. Moreover, our model calculations show that the sign of the cross-shot noise of spin current is negative for all surface states of AS/QD/AS junctions, while it oscillates between positive and negative values for two surface states of AB/QD/AB junctions as we sweep the gate voltage.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-08-06T18:57:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spin current",
      "quantum dot",
      "semiconductor electrodes",
      "cross-shot noise",
      "surface states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "ACS"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}