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.

*This work was supported by the Swiss National Science Foundation (grant \#200021-120347).

–

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