Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 101: Transport - Poster Session
TT 101.32: Poster
Thursday, April 3, 2014, 15:00–19:00, P2
Effects of disorder and contacts on transport through graphene nanoribbons — •Andreas Pieper1, Gerald Schubert2, Gerhard Wellein3, and Holger Fehske1 — 1Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17487 Greifswald, Germany — 2Philips Healthcare, Äyritie 4, 01510 Vantaa, Finland — 3Regionales Rechenzentrum Erlangen, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
We study the transport of charge carriers through finite graphene structures. The use of numerical exact kernel polynomial and Green function techniques allows us to treat actual sized samples beyond the Dirac-cone approximation. Particularly we investigate disordered nanoribbons, normal-conductor/graphene interfaces, and normal-conductor/graphene/normal-conductor junctions with a focus on the behavior of the local density of states, single-particle spectral function, optical conductivity, and conductance. We demonstrate that the contacts and bulk disorder will have a major impact on the electronic properties of graphene-based devices.
A. Pieper, G. Schubert, G. Wellein, and H. Fehske, Phys. Rev. B 88, 195409 (2013)