Abstract
We show that the maximum penetration depth of the anomalous quasiclassical Green's function from a superconductor into an adjacent normal metal is directly related to the phase relaxation time τ ϕ. The latter describes normal-metal phase correlations between two electrons with opposite spins. In the presence of spin-dependent interactions this phase relaxation time differs from the one found in weak localization corrections to the conductivity. The Josephson current measurements in a SINIS-structure could be used to determine τ ϕ experimentally.
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Galaktionov, A.V., Ryu, CM. Dephasing Rate and Superconducting Proximity. Journal of Low Temperature Physics 118, 207–217 (2000). https://doi.org/10.1023/A:1004647124117
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DOI: https://doi.org/10.1023/A:1004647124117