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Bloch-like oscillations in a one-dimensional lattice with long-range correlated disorder | | F Domínguez-Adame
; V A Malyshev
; F A B F de Moura
; M L Lyra
; | | Date: |
7 Nov 2003 | | Journal: | Phys Rev Lett, 91 (19), 197402 | | Abstract: | 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) approximately 1/k(alpha) with alpha>0. de Moura and Lyra [Phys. Rev. Lett. 81, 3735 (1998)]] 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. | | Source: | PubMed, pmid14611616 | | Services: | Forum | Review | Favorites | |
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