Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 743-747 |
| Number of pages | 5 |
| Journal | Physical review letters |
| Volume | 25 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1970 |