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O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.57: Poster
Dienstag, 1. April 2014, 18:30–22:00, P1
An influence of parallel electric field on the dispersion relation of graphene - a new route to Dirac logics — Jakub Sołtys1, Stanisław Krukowski1,2, Jolanta Borysiuk3,4, and •Jacek Piechota1 — 1ICM, University of Warsaw, ul. Pawińskiego 5a, 02-106 Warszawa, Poland — 2Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warsaw, Poland — 3Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland — 4Faculty of Physics, University of Warsaw, ul. Hoza 69, 00-681 Warsaw, Poland
Ab initio density functional theory (DFT) simulations were used to investigate an influence of an electric field, parallel to single and multilayer graphene, on its electron dispersion relations close to the K point. It was shown that for both single layer and AAAA stacking multilayer graphene under an influence of a parallel field the dispersion relations transform to nonlinear ones. The effect, associated with the hexagonal symmetry breaking, opens a new route to high speed transistors and logical devices working in the Dirac regime. The implementation of such a device is presented.