Localization-delocalization transition in a presence of correlated disorder: The random dimer model

Details Localization-delocalization transition in a presence of correlated disorder: The random dimer model Localization-delocalization transition in a presence of correlated disorder: The random dimer model

2003-02-09

arxiv.org/abs/cond-mat/0302161v4

Phys. Rev. B 69, 085109 (2004)

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 3 figures, Revtex

Scientific paper

10.1103/PhysRevB.69.085109

The one dimensional dimer model is investigated and the localization length calculated exactly. The presence of delocalized states at $E_c = \epsilon_{a,b}$ of two possible values of the chemical potential in case of $\mid\epsilon_a-\epsilon_b\mid \leq 2 $ is confirmed and the corresponding indices of the localization length were calculated. The singular integral equation connecting the density of states with the inverse localization length is solved and the analytic expression for the density of states compared with the numerical calculations.

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