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Título:
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Bloch-like oscillations in a one-dimensional lattice with long-range correlated disorder
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Autores:
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Domínguez-Adame Acosta, Francisco ;
Malyshev, Andrey ;
Moura, F. A. B. F., de ;
Lyra, M. L.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2003-11-07
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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We study the dynamics of an electron subjected to a uniform electric field within a tight-binding model with long-range-correlated diagonal disorder. The random distribution of site energies is assumed to have a power spectrum S(k)similar to1/k(alpha) with alpha>0. de Moura and Lyra [Phys. Rev. Lett. 81, 3735 (1998)10.1103/Phys. Rev. Lett.81.3735] predicted that this model supports a phase of delocalized states at the band center, separated from localized states by two mobility edges, provided alpha>2. We find clear signatures of Bloch-like oscillations of an initial Gaussian wave packet between the two mobility edges and determine the bandwidth of extended states, in perfect agreement with the zero-field prediction.
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En línea:
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https://eprints.ucm.es/id/eprint/27484/1/Dguez-Adame63libre.pdf
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