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Fermiology of two-dimensional lateral superlattices

DOI to cite this document:
Albrecht, C. ; Smet, J. ; Weiss, Dieter ; Klitzing, Klaus von ; Hennig, Ralf ; Langenbuch, Michael ; Suhrke, Michael ; Rössler, Ulrich ; Umansky, V. ; Schweizer, H.
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Date of publication of this fulltext: 05 Aug 2009 13:28


We present magnetotransport experiments on high mobility two-dimensional electron systems subjected to a weak, short period superlattice potential. The imposed periodic potential modifies the contours of constant energy of the free electrons such that new closed k-space trajectories, involving magnetic breakdown, become possible. Their existence is heralded by a novel type of low-field quantum oscillations.

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