%0 Journal Article
%A Carvalho, R.C.P.
%A Lyra, M. L.
%A de Moura, F.A.B.F.
%A Domínguez-Adame Acosta, Francisco
%T Localization on a two-channel model with cross-correlated disorder
%D 2011
%@ 0953-8984
%U https://hdl.handle.net/20.500.14352/44663
%X We study the wavepacket dynamics in a two-channel Anderson model with correlated diagonal disorder. To impose correlations in the disorder distribution we construct the on-site energy landscape following both symmetric and antisymmetric rules. Our numerical data show that symmetric cross-correlations have a small impact on the degree of localization of the one-particle eigenstates. In contrast, antisymmetric correlations lead to a reduction of the effective degree of disorder, thus resulting in a substantial increase of the wavepacket spread. A finite-size scaling analysis shows that the antisymmetric cross-correlations, in spite of weakening the localization, do not promote ballistic transport. The present results shed light on recent findings concerning an apparent delocalization transition in a correlated DNA-like ladder model.
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