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

Wehling, T. O.; Balatsky, A. V.; Tsvelik, A. M.; Katsnelson, M. I.; Lichtenstein, A. I.

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

Authors

Description

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.
5 pages, 3 figures, manuscript extended