Nine gigahertz impedance measurements on Ta and Nb point constants
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abstract
The 9 GHz complex impedance of a number of niobium and tantalum superconducting point contacts has been measured as a function of dc bias current. In order to obtain more information, the I-V curve of each junction was also recorded. The impedance measurements are in qualitative agreement with predictions based on the resistively shunted junction model modified to include noise. 1977, IEEE. All rights reserved.