A REAL-SPACE APPROACH TO ELECTRONIC TRANSPORT

Using orthogonal polynomials, a novel approach for studying DC and AC conductivity and velocity-velocity correlation function has been devel oped. The method works in direct space and can treat order or disorder ed, finite or infinite, and pure or alloy systems with equal ease. Fur ther, it is not computer intensive and allows conductivity calculation s as a function of frequency or the location of the Fermi energy in an efficient manner.