Spectral Properties of the Discrete Random Displacement Model

Details Spectral Properties of the Discrete Random Displacement Model Spectral Properties of the Discrete Random Displacement Model

2010-08-06

arxiv.org/abs/1008.1266v1

Physics

Mathematical Physics

26 pages, 2 figures

Scientific paper

We investigate spectral properties of a discrete random displacement model, a Schr\"odinger operator on $\ell^2(\Z^d)$ with potential generated by randomly displacing finitely supported single-site terms from the points of a sublattice of $\Z^d$. In particular, we characterize the upper and lower edges of the almost sure spectrum. For a one-dimensional model with Bernoulli distributed displacements, we can show that the integrated density of states has a $1/\log^2$-singularity at external as well as internal band edges.

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