{
  "id": "0902.4176",
  "version": "v3",
  "published": "2009-02-24T16:09:20.000Z",
  "updated": "2009-09-10T17:54:22.000Z",
  "title": "Localized Collective Excitations in Doped Graphene in Strong Magnetic Fields",
  "authors": [
    "A. M. Fischer",
    "A. B. Dzyubenko",
    "R. A. Roemer"
  ],
  "comment": "5 pages, 5 figures (only 3 captions). Included a more qualitative discussion of the results and method, in particular addressing the issue of screening. Paper lengthened and more references added",
  "journal": "Phys. Rev. B 165410-5 (2009)",
  "doi": "10.1103/PhysRevB.80.165410",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.dis-nn"
  ],
  "abstract": "We consider collective excitations in graphene with filled Landau levels (LL's) in the presence of an external potential due to a single charged donor D+ or acceptor A- impurity. We show that localized collective modes split off the magnetoplasmon continuum and, in addition, quasibound states are formed within the continuum. A study of the evolution of the strengths and energies of magneto-optical transitions is performed for integer filling factors nu = 1, 2, 3, 4 of the lowest LL. We predict impurity absorption peaks above as well as below the cyclotron resonance. We show that the single particle electron-hole symmetry of graphene leads to a duality between the spectra of collective modes for the D+ and A-. The duality shows up as a set of the D+ and A- magneto-absorption peaks having same energies, but active in different circular polarizations.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2009-09-10T17:54:22.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.20.Mf",
      "71.35.Ji",
      "03.65.Ge",
      "71.35.Cc"
    ],
    "keywords": [
      "strong magnetic fields",
      "localized collective excitations",
      "doped graphene",
      "predict impurity absorption peaks",
      "single particle electron-hole symmetry"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Oct",
      "volume": 80,
      "number": 16,
      "pages": 165410
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..80p5410F"
    }
  }
}