Electronic properties of glassy Pt-Si films

Abstract
Glassy films of Pt-Si alloys have been produced by pulsed laser quenching in the composition range of 40 to 93 at.?Si. The electronic properties were investigated by conductivity measurements and ellipsometric determination of the complex dielectric function from 1.4 to 5.5 eV. The system exhibits a metal-nonmetal transition near 20 at.?Pt. The applicability of classical Drude-Lorentz modeling and the influence of the short-range order on the electronic properties is discussed.