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characteristics of the same junction at two different temperatures: (a) hysteretic characteristic at , (b) completely nonhysteretic characteristic at .
characteristics showing the rf-induced steps at of a single overdamped junction at several temperatures. Each curve is shifted on the horizontal axis by . The inset shows the characteristic at at a temperature close to the transition temperature of Nb.
Temperature dependence of the height of the first rf-induced step for single junctions at . The height of the step is normalized to the value of at each temperature.
Temperature dependence of for the same junctions in Fig. 3 . The open circles correspond to data for a ten-junction array.
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