Mitzkus, Christian and Wegscheider, Werner and Umanski, Vladimir and Eberl, Karl and Weiss, Dieter (2008) Interaction-induced temperature-dependent switching of the phase of commensurability oscillations in a one-dimensional lateral superlattice. physica status solidi b 245 (2), pp. 303-308.
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We study magnetotransport of a two-dimensional electron system (2DES) in the presence of an additional one-dimensional potential modulation. The commensurability oscillations observed in such a density modulated 2DES show a temperature dependent switching of their phase in the case when the modulation pattern is orientated parallel to the current. This behavior is compared with a recent theory on the consequences of electron electron interaction by Gornyi and Mirlin [Phys. Rev. B 69, 45313, (2004)]. The theory predicts a temperature dependent mixing of the components of the resistivity tensor, which explains the phase switching as an overlapping of two kinds of commensurability oscillations. Good qualitative agreement between experiment and theory is found.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||01 Feb 2010 13:14|
|Last Modified:||20 Jul 2011 22:19|