Steffens, Oliver and Schlösser, T. and Rotter, Peter and Ensslin, K. and Suhrke, Michael and Kotthaus, J. and Rössler, Ulrich and Holland, M. (1998) From the two-dimensional electron gas to antidot superlattices: Magnetoresistance effects in the transition regime. Journal of Physics: Condensed Matter 10 (17), pp. 3859-3872.
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Other URL: http://stacks.iop.org/0953-8984/10/3859
Magnetoresistance measurements and theoretical calculations for two-dimensional electron systems under a perpendicular magnetic field are presented which illuminate transport effects due to a periodic electrostatic potential modulation. We focus on features arising from the resolution of the magnetic miniband structure which are beyond the perturbative regime governed by the dispersion of Landau bands. Our non-perturbative quantum-mechanical calculations reveal that the dispersion of individual minibands is responsible for the complicated behaviour of the magnetoresistance in the regime of intermediate modulation strength. In particular, the interplay between miniband and scattering contributions to the conductivity leads to an almost structureless magnetoresistance in this regime followed by the formation of antidot peaks due to the miniband conductivity.
|Institutions:||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 20:56|