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HL: Fachverband Halbleiterphysik

HL 7: Graphene 1 (Joint Session with TT)

HL 7.2: Vortrag

Montag, 22. März 2010, 10:30–10:45, H18

Revivals of quantum wave packets in graphene — •Viktor Krückl¹ and Tobias Kramer^1,2 — ¹Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg — ²Department of Physics, Harvard University, Cambridge, MA 02138, USA

We investigate the propagation of wave-packets on graphene in a perpendicular magnetic field. The wave-packet evolution in graphene differs drastically from the one in an electron gas and shows a rich revival structure similar to the dynamics of highly excited Rydberg states [1]. We present a detailed analysis of the occurring collapses, revivals and fractional revivals analytically as well as numerically. In order to study the impact of disorder on the effect we apply our novel numerical scheme to solve the wave-packet propagation on the effective single-particle Dirac-Hamiltonian of graphene in the presence of random impurity potentials.
Viktor Krueckl and Tobias Kramer, New J. Phys. 11 093010 (2009)