Carvalho, R.C.P.Lyra, M. L.de Moura, F.A.B.F.Domínguez-Adame Acosta, Francisco2023-06-202023-06-202011-05-040953-898410.1088/0953-8984/23/17/175304https://hdl.handle.net/20.500.14352/44663©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).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.spajournal articlehttp://dx.doi.org/10.1088/0953-8984/23/17/175304http://iopscience.iop.orgopen access538.9Random-cimer modelDelocalization transitionAnderson modelMobility edgeAbsenceChainsFísica de materialesFísica del estado sólido2211 Física del Estado Sólido