RT Journal Article
T1 Localization on a two-channel model with cross-correlated disorder
A1 Carvalho, R.C.P.
A1 Lyra, M. L.
A1 de Moura, F.A.B.F.
A1 Domínguez-Adame Acosta, Francisco
AB 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.
PB IOP Publishing Ltd.
SN 0953-8984
YR 2011
FD 2011-05-04
LK https://hdl.handle.net/20.500.14352/44663
UL https://hdl.handle.net/20.500.14352/44663
LA spa
NO ©IOP Publishing Ltd.This work was partially financed by the Brazilian Research Agencies CAPES (PROCAD, Rede NanoBioestruturas), CNPq (INCT-Nano(Bio)Simes, Project no. 573925/2008-9) and FAPERN/CNPq (Pronex). Work at Madrid was supported by MEC (projects MOSAICO and MAT2010-17180). FABF de Moura would like to thank the hospitality of Departamento de Física de Materiales (UCM).
NO CAPES (PROCAD, Rede NanoBioestruturas)
NO CNPq (INCT-Nano(Bio)Simes)
NO FAPERN/CNPq (Pronex)
NO MEC
DS Docta Complutense
RD 7 abr 2025