Absence of Anderson localization in certain random lattices

Abstract

We report on the transition between an Anderson localized regime and a conductive regime in a 1D scattering system with correlated disorder. We show experimentally that when long-range correlations, in the form of a power-law spectral density with power larger than 2, are introduced the localization length becomes much bigger than the sample size and the transmission peaks typical of an Anderson localized system merge into a pass band. As other forms of long-range correlations are known to have the opposite effect, i.e. to enhance localization, our results show that care is needed when discussing the effects of correlations, as different kinds of long-range correlations can give rise to very different behavior.

6 pages, 6 figures

References in corpus (4)

• Localization of ultrasound in a three-dimensional elastic network
• Enhancement of localization in one-dimensional random potentials with long-range correlations
• Effects of Scale-Free Disorder on the Anderson Metal-Insulator Transition
• Localization in one-dimensional chains with Lévy-type disorder

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