Nonequilibrium Voltage Fluctuations in Aluminum Wires
ORAL
Abstract
We present measurements of the nonequilibrium voltage fluctuations across current biased superconductive aluminum wires in the vicinity of $T_c$. Above $T_c$ these voltage fluctuations are due to superconductive fluctuations which persist on the time scale of the Ginzburg time. Below $T_c$ we believe they are due to the thermal activated phase slips. The frequency dependence of the fluctuations suggests the observation of the ac Josephson effect above $T_c$.
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