Exact analytic solution of the multidimensional Anderson localization
Abstract
The method proposed by the present authors to deal analytically with the problem of Anderson localization via disorder [J.Phys.: Condens. Matter {\bf 14} (2002) 13777] is generalized for higher spatial dimensions D. In this way the generalized Lyapunov exponents for diagonal correlators of the wave function, $<\psi^2_{n,\mathbf{m}}>$, can be calculated analytically and exactly. This permits to determine the phase diagram of the system. For all dimensions $D > 2$ one finds intervals in the energy and the disorder where extended and localized states coexist: the metalinsulator transition should thus be interpreted as a firstorder transition. The qualitative differences permit to group the systems into two classes: lowdimensional systems ($2\leq D \leq 3$), where localized states are always exponentially localized and highdimensional systems ($D\geq D_c=4$), where states with nonexponential localization are also formed. The value of the upper critical dimension is found to be $D_0=6$ for the Anderson localization problem; this value is also characteristic of a related problem  percolation. Consequences for numerical scaling and other approaches are discussed in detail.
 Publication:

arXiv eprints
 Pub Date:
 February 2004
 arXiv:
 arXiv:condmat/0402463
 Bibcode:
 2004cond.mat..2463K
 Keywords:

 Disordered Systems and Neural Networks
 EPrint:
 25 pages, 5 figures