{
  "id": "cond-mat/0603672",
  "version": "v2",
  "published": "2006-03-24T20:24:35.000Z",
  "updated": "2006-09-01T21:41:20.000Z",
  "title": "Charge transfer via a two-strand superexchange bridge in DNA",
  "authors": [
    "X. F. Wang",
    "Tapash Chakraborty"
  ],
  "comment": "accepted for publication in Phys. Rev. Lett",
  "doi": "10.1103/PhysRevLett.97.106602",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Charge transfer in a DNA duplex chain is studied by constructing a system with virtual electrodes connected at the ends of each DNA strand. The systeym is described by the tight-binding model and its transport is analyzed by the transfer matrix method. The very weak distance dependence in long (G:C)(T:A)_M(G:C)_3 DNA chain observed in experiment [B. Giese, et al., Nature 412, 318 (2001)] is explained by a unistep two-strand superexchange bridge without the need for the multi-step thermally-induced hopping mechanism or the dephasing effect. The crossover number M_c of (T:A) base pairs, where crossover between strong and weak distance dependence occurs, reflects the ratio of intra- and inter-strand neighboring base-base couplings.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-09-01T21:41:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "charge transfer",
      "weak distance dependence occurs",
      "unistep two-strand superexchange bridge",
      "transfer matrix method",
      "dna duplex chain"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}