Superfluid density of a pseudogapped superconductor near the superconductor-insulator transition

M. V. Feigel'man; L. B. Ioffe

doi:10.1103/PhysRevB.92.100509

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Superfluid density of a pseudogapped superconductor near the superconductor-insulator transition

M. V. Feigel'man, L. B. Ioffe

DOI 10.1103/PhysRevB.92.100509 · Physical Review B

T1

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Abstract

We analyze the critical behavior of the superfluid density ρs in strongly disordered superconductors near the superconductor-insulator transition and compare it with the behavior of the spectral gap Δ for collective excitations. We show that, in contrast to conventional superconductors, the superconductors with preformed pairs display an unusual scaling relation ρs∝Δ2 close to the superconductor-insulator transition. This relation has been reported in very recent experiments.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
InO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
TiN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
InOx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.5	Pressure not reported	unknown
NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown