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

Zitzelsperger, M. ; Onderka, Roland ; Suhrke, Michael ; Rössler, Ulrich ; Weiss, Dieter ; Wegscheider, Werner ; Bichler, Max ; Winkler, R. ; Hirayama, Y. ; Muraki, K.
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Date of publication of this fulltext: 14 Dec 2009 13:13


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 ...


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