Issue |
EPL
Volume 84, Number 1, October 2008
|
|
---|---|---|
Article Number | 17003 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/84/17003 | |
Published online | 18 September 2008 |
Midgap states in corrugated graphene: Ab initio calculations and effective field theory
1
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: twehling@physnet.uni-hamburg.de
Received:
24
June
2008
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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