Table of Contents
ISRN Condensed Matter Physics
Volume 2013, Article ID 327913, 9 pages
http://dx.doi.org/10.1155/2013/327913
Research Article

From Graphite to Graphene: The Confinement of the Fermi Surface to the Line KH

Arnold Sommerfeld Center, University of Munich, Theresienstraβe 37 IV, 80333 Munich, Germany

Received 7 March 2013; Accepted 9 April 2013

Academic Editors: K. Kasamatsu, A. N. Kocharian, V. Kochereshko, R. Rossmanith, and S. Wang

Copyright © 2013 Helmut Bross. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The graphite structure is self-consistently calculated by use of the all electron Modified Augmented Plane Wave (MAPW) scheme with lattice constants considerably enlarged above the experimental value of graphite. Overall, the band structures of the series are found to be quite similar: the energy levels of the highly symmetric states K and H almost coincide, essentially fixing the Fermi level of the semimetallic solid. The dispersion along lines parallel to the atomic planes, already small in graphite at the experimental value of , continues to flatten with increasing value of . The structure with an interlayer distance enlarged by the factor 3 over the experimental value provides a good approximation of the behaviour of a monoatomic sheet. In this context, the unusual behaviour of graphene appears in a new light.