{
  "id": "cond-mat/0509429",
  "version": "v1",
  "published": "2005-09-16T03:17:39.000Z",
  "updated": "2005-09-16T03:17:39.000Z",
  "title": "Excitons in Carbon Nanotubes with Broken Time-Reversal Symmetry",
  "authors": [
    "S. Zaric",
    "G. N. Ostojic",
    "J. Shaver",
    "J. Kono",
    "O. Portugall",
    "P. H. Frings",
    "G. L. J. A. Rikken",
    "M. Furis",
    "S. A. Crooker",
    "X. Wei",
    "V. C. Moore",
    "R. H. Hauge",
    "R. E. Smalley"
  ],
  "comment": "4 pages, 4 figures",
  "journal": "Phys. Rev. Lett. 96, 016406 (2006)",
  "doi": "10.1103/PhysRevLett.96.016406",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "Near-infrared magneto-optical spectroscopy of single-walled carbon nanotubes reveals two absorption peaks with an equal strength at high magnetic fields ($>$ 55 T). We show that the peak separation is determined by the Aharonov-Bohm phase due to the tube-threading magnetic flux, which breaks the time-reversal symmetry and lifts the valley degeneracy. This field-induced symmetry breaking thus overcomes the Coulomb-induced intervalley mixing which is predicted to make the lowest exciton state optically inactive (or ``dark'').",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-09-16T03:17:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "broken time-reversal symmetry",
      "high magnetic fields",
      "equal strength",
      "aharonov-bohm phase",
      "lowest exciton state optically inactive"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}