{
  "id": "0912.3614",
  "version": "v1",
  "published": "2009-12-18T09:18:38.000Z",
  "updated": "2009-12-18T09:18:38.000Z",
  "title": "Strain effect on the optical conductivity of graphene",
  "authors": [
    "F. M. D. Pellegrino",
    "G. G. N. Angilella",
    "R. Pucci"
  ],
  "comment": "Phys. Rev. B, to appear",
  "journal": "Phys. Rev. B 81 (2010) 035411",
  "doi": "10.1103/PhysRevB.81.035411",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Within the tight binding approximation, we study the dependence of the electronic band structure and of the optical conductivity of a graphene single layer on the modulus and direction of applied uniaxial strain. While the Dirac cone approximation, albeit with a deformed cone, is robust for sufficiently small strain, band dispersion linearity breaks down along a given direction, corresponding to the development of anisotropic massive low-energy excitations. We recover a linear behavior of the low-energy density of states, as long as the cone approximation holds, while a band gap opens for sufficiently intense strain, for almost all, generic strain directions. This may be interpreted in terms of an electronic topological transition, corresponding to a change of topology of the Fermi line, and to the merging of two inequivalent Dirac points as a function of strain. We propose that these features may be observed in the frequency dependence of the longitudinal optical conductivity in the visible range, as a function of strain modulus and direction, as well as of field orientation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-12-18T09:18:38.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "78.40.Ri",
      "62.20.-x",
      "81.05.U-"
    ],
    "keywords": [
      "optical conductivity",
      "strain effect",
      "band dispersion linearity breaks",
      "cone approximation holds",
      "anisotropic massive low-energy excitations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2010,
      "month": "Jan",
      "volume": 81,
      "number": 3,
      "pages": "035411"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvB..81c5411P"
    }
  }
}