Hennig, Ralf and Rotter, Peter and Suhrke, Michael and Rössler, Ulrich (1998) Negative magnetoresistance in antidot lattices with saddle points. Physica B 249-25, pp. 321-325.
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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 effect because of the increased probability of closed paths due to the insertion of additional potential barriers. We analyze the influence of the strength of inelastic scattering as well as increasing temperatures, i.e. energy averaging, in order to separate the classical and the quantum contributions.
|Date:||17 June 1998|
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler|
|Keywords:||Antidot arrays; Negative magnetoresistance|
|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 20:56|