Relation between Energy Level Statistics and Phase Transition and its Application to the Anderson Model

Abstract

A general method to describe a second-order phase transition is discussed. It starts from the energy level statistics and uses of finite-size scaling. It is applied to the metal-insulator transition (MIT) in the Anderson model of localization, evaluating the cumulative level-spacing distribution as well as the Dyson-Metha statistics. The critical disorder $W_c=16.5$ and the critical exponent $\nu =1.34$ are computed.

9 pages, Latex, 6 PostScript figures in uuencoded compressed tar file are appended