Journal ArticleDOI
Absence of localization in a random-dimer model
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TLDR
The dual of the random-dimer model is also shown to exhibit an absence of localization and is shown to be relevant to transmission resonances in Fibonacci lattices.Abstract:
We consider here a 1D tight-binding model with two uncorrelated random site energies ${\mathrm{\ensuremath{\epsilon}}}_{\mathit{a}}$ and ${\mathrm{\ensuremath{\epsilon}}}_{\mathit{b}}$ and a constant nearest-neighbor matrix element V. We show that if one (or both) of the site energies is assigned at random to pairs of lattice sites (that is, two sites in succession), an initially localized particle can become delocalized. Its mean-square displacement at long times is shown to grow in time as ${\mathit{t}}^{3/2}$ provided that -2V${\mathrm{\ensuremath{\epsilon}}}_{\mathit{a}}$-${\mathrm{\ensuremath{\epsilon}}}_{\mathit{b}}$2V. Diffusion occurs if ${\mathrm{\ensuremath{\epsilon}}}_{\mathit{a}}$-${\mathrm{\ensuremath{\epsilon}}}_{\mathit{b}}$=\ifmmode\pm\else\textpm\fi{}2V and localization otherwise. The dual of the random-dimer model is also shown to exhibit an absence of localization and is shown to be relevant to transmission resonances in Fibonacci lattices.read more
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Localization and its absence: a new metallic state for conducting polymers.
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Asymmetric wave propagation in nonlinear systems.
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Anomalous localization in low-dimensional systems with correlated disorder
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Metal–insulator transition in chains with correlated disorder
Pedro Carpena,Pedro Carpena,Pedro Bernaola-Galván,Pedro Bernaola-Galván,Plamen Ch. Ivanov,H. Eugene Stanley +5 more
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Dynamical localization for discrete and continuous random schrodinger operators
François Germinet,S. De Bièvre +1 more
TL;DR: In this article, it was shown that dynamical localization holds for a large class of random Schrodinger operators on and on, with probability one, for a suitable energy interval I and for q a positive real, where ψ is a function of sufficiently rapid decrease.