Chaos and commensurability in hole-antidot arrays with non-isotropic Fermi surface

DOI to cite this document:: 10.5283/epub.1331

Zitzlsperger, M. ; Onderka, Roland ; Suhrke, Michael ; Rössler, Ulrich ; Weiss, Dieter ; Wegscheider, Werner ; Winkler, R. ; Hiroyama, Y. ; Muraki, K.

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Date of publication of this fulltext: 05 Aug 2009 13:27

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Abstract

Periodic antidot arrays imposed upon two-dimensional hole systems (2DHSs) display a striking dependence of the positive low-field magnetoresistance on the in-plane crystallographic orientation of the superlattice. An enhanced positive magnetoresistance can be ascribed to the 2DHSs non-circular Fermi surface which stabilizes chaotic trajectories for specific crystallographic directions. The effect ...