Directed transport born from chaos in asymmetric antidot structures

Details Directed transport born from chaos in asymmetric antidot structures Directed transport born from chaos in asymmetric antidot structures

2005-09-27

arxiv.org/abs/cond-mat/0509679v2

Eur. Phys. J. B 52, 389-396 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 10 figures

Scientific paper

10.1140/epjb/e2006-00295-5

It is shown that a polarized microwave radiation creates directed transport in an asymmetric antidot superlattice in a two dimensional electron gas. A numerical method is developed that allows to establish the dependence of this ratchet effect on several parameters relevant for real experimental studies. It is applied to the concrete case of a semidisk Galton board where the electron dynamics is chaotic in the absence of microwave driving. The obtained results show that high currents can be reached at a relatively low microwave power. This effect opens new possibilities for microwave control of transport in asymmetric superlattices.

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