Contact resistance as a measure of the superconducting order parameter
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- Chien, M.K. & Farrell, D.E. J Low Temp Phys (1975) 19: 75. doi:10.1007/BF00115531
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We have shown experimentally that the electrical contact resistance between a thin copper wire and a bulk superconductor contains a small contribution that varies with temperature below Tc. The observed temperature dependence is always close to that of the energy gap in the superconductor.