Effect of Pair Breaking on Mesoscopic Persistent Currents Well above the Superconducting Transition Temperature

H. Bary-Soroker; O. Entin-Wohlman; Y. Imry

doi:10.1103/PhysRevLett.101.057001

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Effect of Pair Breaking on Mesoscopic Persistent Currents Well above the Superconducting Transition Temperature

H. Bary-Soroker, O. Entin-Wohlman, Y. Imry

DOI 10.1103/PhysRevLett.101.057001 · Physical Review Letters

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Abstract

We consider the mesoscopic normal persistent current (PC) in a very low-temperature superconductor with a bare transition temperature Tc0 much smaller than the Thouless energy Ec. We show that in a rather broad range of pair-breaking strength, Tc0≲ℏ/τs≲Ec, the transition temperature is renormalized to zero, but the PC is hardly affected. This may provide an explanation for the magnitude of the average PC’s in the noble metals, as well as a way to determine their Tc0’s.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Cu Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.0015	Pressure not reported	unknown