Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 6: Poster Session I
DY 6.34: Poster
Montag, 22. März 2010, 16:00–18:00, Poster B2
Transport in Correlated Random Media — •Otto Dietz1, Ulrich Kuhl1, Hans-Jürgen Stöckmann1, Felix M. Izrailev2, and Nykolay M. Makarov2 — 1Fachbereich Physik, Universität Marburg, Germany — 2Instituto de Física, Universidad de Puebla, Mexico
We investigate the microwave transport properties of quasi-one-dimensional channels with correlated disorder. The correspondence between quantum and classical wave equations allows to use classical waves to understand electron transport properties in new low dimensional materials like nanowires and graphene stripes. Theoretical studies predict that the transport should strongly depend on the correlation of the disorder for bulk [1] and surface [2] disorder. These correlations can be created by inserting brass bars or copper cylinders into the waveguide and allow for a precise prescription of the transport properties of a given frequency region. Previous studies could confirm these results [3] in a one-dimensional channel with bulk disorder. We were able to expand these observations to various types of disorder. We found a strong non-evanescent transport unpredicted by theory in disordered systems in a frequency range where only evanescent transport is expected. This shows the limit of the propagating mode model and allows for estimating the range of its applicability in new nano experiments.
[1] J. C. Hernández Herrejón et al., Physica E 40, 3137 (2008).
[2] M. Rendón et al., Phys. Rev. B 75, 205404 (2007).
[3] U. Kuhl et al., Phys. Rev. Lett. 100, 126402 (2008).