ac-Field-Controlled Anderson Localization in Disordered Semiconductor Superlattices
Condensed Matter
2009-10-28 v1
Abstract
An ac field, tuned exactly to resonance with the Stark ladder in an ideal tight binding lattice under strong dc bias, counteracts Wannier-Stark localization and leads to the emergence of extended Floquet states. If there is random disorder, these states localize. The localization lengths depend non-monotonically on the ac field amplitude and become essentially zero at certain parameters. This effect is of possible relevance for characterizing the quality of superlattice samples, and for performing experiments on Anderson localization in systems with well-defined disorder.
Keywords
Cite
@article{arxiv.cond-mat/9505043,
title = {ac-Field-Controlled Anderson Localization in Disordered Semiconductor Superlattices},
author = {Martin Holthaus and Gerald H. Ristow and Daniel W. Hone},
journal= {arXiv preprint arXiv:cond-mat/9505043},
year = {2009}
}
Comments
10 pages, Latex; figures available on request from hone@itp.ucsb.edu;