Format

Send to

Choose Destination
See comment in PubMed Commons below
Phys Rev Lett. 2009 Jan 23;102(3):037403. Epub 2009 Jan 23.

Band structure asymmetry of bilayer graphene revealed by infrared spectroscopy.

Author information

  • 1Department of Physics, University of California, San Diego, La Jolla, California 92093, USA. zhiqiang@physics.ucsd.edu

Abstract

We report on infrared spectroscopy of bilayer graphene integrated in gated structures. We observe a significant asymmetry in the optical conductivity upon electrostatic doping of electrons and holes. We show that this finding arises from a marked asymmetry between the valence and conduction bands, which is mainly due to the inequivalence of the two sublattices within the graphene layer and the next-nearest-neighbor interlayer coupling. From the conductivity data, the energy difference of the two sublattices and the interlayer coupling energy are directly determined.

PMID:
19257394
DOI:
10.1103/PhysRevLett.102.037403
[PubMed]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Physical Society
    Loading ...
    Support Center