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Interaction‐induced temperature‐dependent switching of the phase of commensurability oscillations in a one‐dimensional lateral superlattice
Author(s) -
Mitzkus Christian,
Wegscheider Werner,
Umanski Vladimir,
Eberl Karl,
Weiss Dieter
Publication year - 2008
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200743313
Subject(s) - commensurability (mathematics) , superlattice , condensed matter physics , physics , modulation (music) , electron , phase (matter) , quantum mechanics , mathematics , acoustics , geometry
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. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)