AC-field-controlled localization-delocalization transition in one dimensional disordered system

Details AC-field-controlled localization-delocalization transition in one dimensional disordered system AC-field-controlled localization-delocalization transition in one dimensional disordered system

2006-03-27

arxiv.org/abs/cond-mat/0603720v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 5 figures

Scientific paper

10.1103/PhysRevB.74.115304

Based on the random dimer model, we study correlated disorder in a one dimensional system driven by a strong AC field. As the correlations in a random system may generate extended states and enhance transport in DC fields, we explore the role that AC fields have on these properties. We find that similar to ordered structures, AC fields renormalize the effective hopping constant to a smaller value, and thus help to localize a state. We find that AC fields control then a localization-delocalization transition in a given one dimensional systems with correlated disorder. The competition between band renormalization (band collapse/dynamic localization), Anderson localization, and the structure correlation is shown to result in interesting transport properties.

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