{
  "id": "1001.3370",
  "version": "v2",
  "published": "2010-01-19T17:39:57.000Z",
  "updated": "2010-08-16T07:38:48.000Z",
  "title": "Spectral features due to inter-Landau-level transitions in the Raman spectrum of bilayer graphene",
  "authors": [
    "M. Mucha-Kruczynski",
    "O. Kashuba",
    "V. I. Fal'ko"
  ],
  "comment": "7 pages, 3 figures, expanded version published in PRB",
  "journal": "Physical Review B 82, 045405 (2010)",
  "doi": "10.1103/PhysRevB.82.045405",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate the contribution of the low-energy electronic excitations towards the Raman spectrum of bilayer graphene for the incoming photon energy Omega >> 1eV. Starting with the four-band tight-binding model, we derive an effective scattering amplitude that can be incorporated into the commonly used two-band approximation. Due to the influence of the high-energy bands, this effective scattering amplitude is different from the contact interaction amplitude obtained within the two-band model alone. We then calculate the spectral density of the inelastic light scattering accompanied by the excitation of electron-hole pairs in bilayer graphene. In the absence of a magnetic field, due to the parabolic dispersion of the low-energy bands in a bilayer crystal, this contribution is constant and in doped structures has a threshold at twice the Fermi energy. In an external magnetic field, the dominant Raman-active modes are the n_{-} to n_{+} inter-Landau-level transitions with crossed polarisation of in/out photons. We estimate the quantum efficiency of a single n_{-} to n_{+} transition in the magnetic field of 10T as I_{n_{-} to n_{+}}~10^{-12}.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-08-16T07:38:48.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.22.Pr",
      "71.70.Di",
      "78.67.Wj",
      "81.05.ue"
    ],
    "keywords": [
      "bilayer graphene",
      "inter-landau-level transitions",
      "raman spectrum",
      "spectral features",
      "effective scattering amplitude"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2010,
      "month": "Jul",
      "volume": 82,
      "number": 4,
      "pages": "045405"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvB..82d5405M"
    }
  }
}