Dresden 2009 – wissenschaftliches Programm

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SYTG: Symposium Transport in Graphene

SYTG 1: Symposium: Transport in Graphene

SYTG 1.4: Hauptvortrag

Dienstag, 24. März 2009, 15:30–16:00, BAR SCHÖ

Theory of ballistic transport in graphene — •Bjoern Trauzettel — Institut fuer Theoretische Physik und Astrophysik, Universitaet Wuerzburg

We explain the theory of ballistic transport in graphene using the scattering matrix formalism based on the Dirac equation. This approach allows calculating the conductance (or likewise the conductivity) as well as the current noise through graphene nanostructures. We put a strong emphasis on the temperature dependence of transport properties. We show that the conductivity σ at high temperature T and low electron density n grows linearly with T, while at low T and high n it follows σ ∝ √|n|. Our results qualitatively agree with recently measured data on suspended graphene sheets.