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Coherent electron dynamics in a two-dimensional random system with mobility edges Moura, F. A. B. F., de Lyra, M. L. Domínguez-Adame Acosta, Francisco Malyshev, Andrey 538.9 Range correlated disorder Random-dimer model Metal-insulator-transition Anderson model Conducting polymers Diagonal disorder Localization Delocalization Absence Diffusion Física de materiales © Copyright IOP Publishing. This work was partially supported by CNPq, CAPES, and FINEP (Federal Brazilian Agencies), and FAPEAL (Alagoas State Agencies). Work in Madrid was supported by MEC (project FIS2006-01485). VAM acknowledges support from the Stichting voor Fundamenteel Onderzoek der Materie (FOM) and from ISTC (grant no 2679). We study numerically the dynamics of a one-electron wavepacket in a two-dimensional random lattice with long-range correlated diagonal disorder in the presence of a uniform electric field. The time-dependent Schrodinger equation is used for this purpose. We find that the wavepacket displays Bloch-like oscillations associated with the appearance of a phase of delocalized states in the strong correlation regime. The amplitude of oscillations directly reflects the bandwidth of the phase and allows us to measure it. The oscillations reveal two main frequencies whose values are determined by the structure of the underlying potential in the vicinity of the wavepacket maximum. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasil Coordenação de aperfeiçoamento de pessoal de nivel superior (CAPES), Brasil Financiadora de Estudos e Projetos (FINEP), Brasil Fundação de Amparo à Pesquisa do Estado de Alagoas (FAPEAL), Brasil Ministerio de Educación y Ciencia (MEC), España Stichting voor Fundamenteel Onderzoek der Materie (FOM), Holanda International Science and Technology Center (ISTC) Depto. de Física de Materiales Fac. de Ciencias Físicas TRUE pub 2023-06-20T11:15:45Z 2023-06-20T11:15:45Z 2007-02-07 journal article https://hdl.handle.net/20.500.14352/51891 0953-8984 10.1088/0953-8984/19/5/056204 eng FIS2006-01485 2679 open access application/pdf IOP Publishing Ltd.