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

TL;DR

This paper investigates how strong AC fields influence localization and delocalization in a one-dimensional disordered system with correlated disorder, revealing control over transport properties through field-induced effects.

Contribution

It demonstrates that AC fields can induce a transition between localized and delocalized states in a correlated disordered system, extending understanding of dynamic localization phenomena.

Findings

AC fields renormalize effective hopping, promoting localization.

AC fields can induce a localization-delocalization transition.

Transport properties are affected by the interplay of band renormalization, Anderson localization, and disorder correlations.

Abstract

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.