Resistivity of strong-scattering alloys: absence of localization and success of coherent-potential approximation confirmed by exact supercell calculations in V1−xAlx

A supercell procedure for exact evaluation of the one-electron Kubo-Greenwood formula is applied to the resistivity rho of V/sub 1-//sub x/Al/sub x/ alloys and compared with a Korringa-Kohn-Rostoker coherent-potential approximation calculation. The results of these calculations agree well, consistent with the observation of delocalized eigenstates, in spite of the very high resistivity, rhoapprox. =200 ..mu cap omega.. cm.