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Explanation of delocalization in the continuous random-dimer model

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Sánchez, Angel and Domínguez-Adame Acosta, Francisco and Berman, Gennady P. and Izrailev, Felix (1995) Explanation of delocalization in the continuous random-dimer model. Physical Review B, 51 (10). pp. 6769-6772. ISSN 0163-1829

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Official URL: http://dx.doi.org/10.1103/PhysRevB.51.6769


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Abstract

We propose an explanation of the bands of extended states appearing in random one-dimensional models with correlated disorder, focusing on the continuous random-dimer model [A. Sanchez, E. Macia, and F. Dominguez-Adame, Phys. Rev. B 49, 147 (1994)].We show exactly that the transmission coefficient at the resonant energy is independent of the number of host sites between two consecutive dimers. This allows us to understand why there are bands of extended states for every realization of the model as well as the dependence of the bandwidths on the concentration. We carry out a perturbative calculation that sheds more light on the above results. In the conclusion we discuss generalizations of our results to other models and possible applications
which arise from insight into this problem.


Item Type:Article
Additional Information:

© 1995 The American Physical Society. A.S. was partially supported by MEC (Spain)/Fulbright, by DGICyT (Spain) through project PB92-0248, and by the European Union Human Capital and Mobility Programme through Contract No. ERBCHRXCT930413. F.D.-A. was supported by Universidad Complutense through project PR161/93-4811. G.P.B. gratefully acknowledges partial support from Linkage Grant No. 93-1602 from NATO Special
Programme Panel on Nanotechnology. Work at Los Alamos is performed under the auspices of the U.S. Department of Energy.

Uncontrolled Keywords:Localization, Absence
Subjects:Sciences > Physics > Materials
ID Code:28029
Deposited On:29 Jan 2015 09:24
Last Modified:29 Jan 2015 09:24

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