Tight-binding model for strongly modulated two-dimensional superlattices

Details Tight-binding model for strongly modulated two-dimensional superlattices Tight-binding model for strongly modulated two-dimensional superlattices

2002-08-12

arxiv.org/abs/cond-mat/0208224v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures, LaTeX, iopart, in proceedings of the 26th ICPS

Scientific paper

Common models describing magnetotransport properties of periodically modulated two--dimensional systems often either directly start from a semiclassical approach or give results well conceivable within the semiclassical framework. Recently, magnetoresistance oscillations have been found on samples with strong unilateral modulation and short period (d=15 nm) which cannot be explained on a semiclassical level (magnetic breakdown). We use a simple fully quantum mechanical model which gives us both magnetoresistance data nicely comparing to the experiments and a good intuitive insight into the effects taking place in the system.

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