F. Klopp and T. Wolff
Lifshitz tails for 2-dimensional random Schr dinger operators
(378K, Gzipped Postcript)

ABSTRACT.  The purpose of this paper is to prove that, for a 2-dimensional 
continuous Anderson model, at an open band edge, the density of 
states exhibits a Lifshitz behavior. The Lifshitz exponent need not 
be $d/2=1$ but is determined by the behaviour of the Floquet 
eigenvalues of a well chosen background periodic Schr dinger 
operator.