Temperature Dependence of1fNoise in Silver and Copper

Abstract

We report the first systematic measurements of the temperature dependence of excess noise in metals. The magnitude of the noise in thin films of both Cu and Ag shows a rapid increase with increasing temperature between 90 and 350 K. In Ag, the noise reaches a maximum at $T_p\cong 410$ K, then decreases slowly. In Cu, the peak occurs at $T_p\cong 490$ K. The strong observed temperature dependences is in sharp disagreement with the predictions of current models for the origin of the noise.