Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 26: Transport: Graphene and Carbon Nanotubes

TT 26.5: Vortrag

Mittwoch, 25. März 2009, 15:15–15:30, HSZ 03

Time dependent transport in graphene nanosystems — •Viktor Krückl¹, Christoph Kreisbeck¹, and Tobias Kramer^1,2 — ¹Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg — ²Department of Physics, Harvard University, Cambridge, MA 02138, USA

In recent experiments the Quantum Hall Effect in graphene is measured for high magnetic fields leading to numerous different filling factors. In order to characterise these effects, we investigate the local density of states for the massless Dirac Hamiltonian in crossed electric and magnetic fields. We predict a unique substructure for each Landau level and present analytical expressions to describe their composition. For more complex setups we present an algorithm which solves the time dependent problem. The numerical data corresponds up to a very high accuracy to the aforementioned analytically solvable problem. Within this computational scheme also other phenomena like the Zitterbewegung can be studied.