Fermi-liquid effects in the gapless state of marginally thin superconducting films

G. Catelani; X. S. Wu; P. W. Adams

doi:10.1103/PhysRevB.78.104515

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Fermi-liquid effects in the gapless state of marginally thin superconducting films

G. Catelani, X. S. Wu, P. W. Adams

DOI 10.1103/PhysRevB.78.104515 · Physical Review B

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Abstract

We present low-temperature tunneling density-of-states measurements in Al films in high parallel magnetic fields. The thickness range of the films, t=6–9 nm, was chosen so that the orbital and Zeeman contributions to their parallel critical fields were comparable. In this quasispin paramagnetically limited configuration, the field produces a significant suppression of the gap, and at high fields the gapless state is reached. By comparing measured and calculated tunneling spectra we are able to extract the value of the antisymmetric Fermi-liquid parameter G0 and thereby deduce the quasiparticle density dependence of the effective parameter Geff0 across the gapless state.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.7	Pressure not reported	unknown
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.1	Pressure not reported	unknown
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.7	Pressure not reported	unknown
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.1	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
Ga Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Be Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown