Volume 84, Number 1, October 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||18 September 2008|
Midgap states in corrugated graphene: Ab initio calculations and effective field theory
I. Institut für Theoretische Physik, Universität Hamburg - Jungiusstraße 9, D-20355 Hamburg, Germany, EU
2 Theoretical Division, Los Alamos National Laboratory - Los Alamos, NM 87545, USA
3 Center for Integrated Nanotechnologies, Los Alamos National Laboratory - Los Alamos, NM 87545, USA
4 Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory Upton, NY 11973-5000, USA
5 Institute for Molecules and Materials, Radboud University of Nijmegen Heijendaalseweg 135, 6525 AJ Nijmegen, The Netherlands, EU
Corresponding author: email@example.com
Accepted: 22 August 2008
We investigate the electronic properties of corrugated graphene and show how rippling-induced pseudo-magnetic fields alter graphene's low-energy electronic properties by combining first-principle calculations with an effective field theory. The formation of flat bands near the Fermi level corresponding to pseudo-Landau levels is studied as a function of the rippling parameters. Quenched and relaxed ripples turn out to be fundamentally different is this respect: it is demonstrated, both numerically and analytically, that annealing of quenched ripples can destroy the flat bands.
PACS: 73.21.-b – Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems / 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
© EPLA, 2008
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