Midgap states in corrugated graphene: Ab-initio calculations and effective field theory

Details Midgap states in corrugated graphene: Ab-initio calculations and effective field theory Midgap states in corrugated graphene: Ab-initio calculations and effective field theory

2007-10-31

arxiv.org/abs/0710.5828v2

Europhys. Lett. 84, 17003 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures, manuscript extended

Scientific paper

10.1209/0295-5075/84/17003

We investigate the electronic properties of corrugated graphene and show how rippling-induced pseudomagnetic fields alter graphene's low-energy electronic properties by combining first principles 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.

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