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Negative magnetoresistance in antidot lattices with saddle points

DOI to cite this document:
Hennig, Ralf ; Rotter, Peter ; Suhrke, Michael ; Rössler, Ulrich
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Date of publication of this fulltext: 05 Aug 2009 13:28


We have performed quantum-mechanical as well as classical magnetotransport calculations for a lattice of antidots with additional barriers. Both approaches reproduce the experimentally observed well-known commensurability peaks simultaneously with a negative differential magnetoresistance. By comparing both calculations, we find that quantum interference leads to an enhancement of the latter ...


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