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Anomalous temperature dependence of commensurabilit oscillations in one two dimensional lateral superlattices

Mitzkus, C ; Kangler, W ; Weiss, Dieter ; Umanski, V ; Wegscheider, Werner


Two-dimensional electron systems were laterally modulated using the method of in situ interferometric illumination. Magnetotransport measurements on 1D and 2D modulated systems revealed a phase change of the commensurability oscillations depending on temperature. This behaviour is surprising and cannot be explained by existing theories.

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