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Role of Correlations and Off-Diagonal Terms in Binary Disordered One-Dimensional Systems

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Kosior A., Major J., Płodzień M., Zakrzewski J.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 6
1002-1007
EN
We investigate one-dimensional tight binding model in the presence of a correlated binary disorder. The disorder is due to the interaction of particles with heavy immobile other species. Off-diagonal disorder is created by means of a fast periodic modulation of interspecies interaction. The method based on transfer matrix techniques allows us to calculate the energies of extended modes in the correlated binary disorder. We focus on N-mer correlations and regain known results for the case of purely diagonal disorder. For off-diagonal disorder we find resonant energies. We discuss ambiguous properties of those states and compare analytical results with numerical calculations. Separately we describe a special case of the dual random dimer model.
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