Experimental determination of the pair susceptibility of a superconductor

J. T. Anderson, Allen M Goldman

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


An excess tunneling current due to order-parameter fluctuations has been found in tin-tin oxide-lead junctions just above the transition temperature of tin. Details of the variation of the excess current with voltage, magnetic field, and temperature are in agreement with a calculation by Scalapino in which the excess-current voltage characteristic is a direct measure of the frequency- and wave-number-dependent pair susceptibility characteristic of the superconducting transition. Estimates of the pair relaxation frequency in tin based on the data are 50% greater than theoretical predictions.

Original languageEnglish (US)
Pages (from-to)743-747
Number of pages5
JournalPhysical review letters
Issue number11
StatePublished - 1970


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