Enhanced suppresion of localization in a continuous Random-Dimer Model

Details Enhanced suppresion of localization in a continuous Random-Dimer Model Enhanced suppresion of localization in a continuous Random-Dimer Model

1993-01-21

arxiv.org/abs/cond-mat/9301025v1

J.Phys. A27 (1994) 3725-3730

Physics

Condensed Matter

10 pages, 3 Figures available on request, REVTeX 3.0, MA/UC3M/1/93

Scientific paper

10.1088/0305-4470/27/11/022

We consider a one-dimensional continuous (Kronig-Penney) extension of the (tight-binding) Random Dimer model of Dunlap et al. [Phys. Rev. Lett. 65, 88 (1990)]. We predict that the continuous model has infinitely many resonances (zeroes of the reflection coefficient) giving rise to extended states instead of the one resonance arising in the discrete version. We present exact, transfer-matrix numerical calculations supporting, both realizationwise and on the average, the conclusion that the model has a very large number of extended states.

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