Thermoelectric power of two-dimensional Pd and Pd-Au films

We have studied the effects of two-dimensional electron localization on the temperature dependence of the resistivity and thermoelectric power of palladium and palladium-gold alloy thin films. All "metallic" ($R_{\square }<30\mathrm{}$ kΩ/□) samples have a small material specific thermopower which tends to zero as $T\to 0$. Samples whose resistivity increases above 30 000 Ω/□ have thermopowers which increase as $T\to 0$. Thus the density of states for the electronic transport is zero at the Fermi energy for high-resistivity films.