Percolation Approach to the Metal-Insulator Transition in Super-Critical Fluid Metals. II. –Quantal Percolation Approach–

Abstract

We study a quantal percolation process in a square lattice gas in the super-critical regions by making use of a computer simulation. Critical quantal percolation density is determined by a criterion of electron localization. Our result suggests that the critical quantal percolation density is very close to the critical density for the classical percolation at all temperatures above the critical temperature. We also discuss the temperature dependence of the one-electron density of states of the lattice gas.