Infrared spectroscopy of electronic bands in bilayer graphene

ORAL

Abstract

We present infrared spectra (0.1-1 eV) of electrostatically gated bilayer graphene as a function of doping and compare them with tight binding calculations. All major spectral features corresponding to the expected interband transitions are identified in the spectra: a strong peak due to transitions between parallel split-off bands and two onset-like features due to transitions between valence and conduction bands. A significant electron-hole asymmetry is observed.

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Authors

  • Alexey Kuzmenko

    University of Geneva

  • Erik van Heumen

    University of Geneva

  • Dirk van der Marel

    University of Geneva

  • Philippe Lerch

    Paul Scherrer Institute, Switzerland

  • Peter Blake

    University of Manchester

  • Kostya Novoselov

    University of Manchester, Manchester University

  • Andre Geim

    University of Manchester, Manchester University