Zitzelssperger, M. and Onderka, Roland and Suhrke, Michael and Rössler, Ulrich and Weiss, Dieter and Wegscheider, Werner and Winkler, R. and Hiroyama, Y. and Muraki, K. (2003) Chaos and commensurability in hole-antidot arrays with non-isotropic Fermi surface. Europhysics Letters 61 (3), pp. 382-388.
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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 provides a first example of the role of non-spherical Fermi surfaces on the classical chaotic dynamics of charge carriers. Transport calculations taking into account both the classical chaotic motion of the holes in antidot lattices and the warped Fermi contour confirm this picture.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider
Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:54|