Strong eigenfunction correlations near the Anderson localization transition

Details Strong eigenfunction correlations near the Anderson localization transition Strong eigenfunction correlations near the Anderson localization transition

1996-12-24

arxiv.org/abs/cond-mat/9612218v1

Phys.Rev.B v.55 (1997), 16001

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, RevTeX

Scientific paper

10.1103/PhysRevB.55.R16001

We study overlap of two different eigenfunctions as compared with self-overlap in the framework of an infinite-dimensional version of the disordered tight-binding model. Despite a very sparse structure of the eigenstates in the vicinity of Anderson transition their mutual overlap is still found to be of the same order as self-overlap as long as energy separation is smaller than a critical value. The latter fact explains robustness of the Wigner-Dyson level statistics everywhere in the phase of extended states. The same picture is expected to hold for usual d-dimensional conductors, ensuring the $s^{\beta}$ form of the level repulsion at critical point.

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