Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 31: Poster II
HL 31.54: Poster
Dienstag, 26. Februar 2008, 16:30–19:00, Poster D
Substrate induced low-dimensionality in few-layer graphene — •Jörg Kinzel1, Jens Ebbecke1,2,3, and Achim Wixforth1,2 — 1Lehrstuhl für Experimentalphysik 1, Universität Augsburg, Germany — 2Center for NanoScience, München, Germany — 3School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
Since the first fabrication of few- and single-layer graphene many surprising properties have been discovered in this material.
By using a special technique for exfoliation, we were able to produce few-layer graphene (FLG) on top of a rather rough SiO2 surface. Such FLG devices already exhibit some of the extraordinary properties of a single-layer graphene flake. In our case, surface roughness induced humps locally distort the graphene layers and bend their nearly flat hexagonal topology, inducing local strain and stress modulations.
Conduction measurements at liquid helium temperatures exhibit the typical graphene V shaped conductivity with a minimum at finite gate bias which, however, is superimposed by Coulomb blockade like oscillations.