Far-infrared properties and characterization of superconducting Nb3Ge

W. B. Cook; S. Perkowitz

doi:10.1103/PhysRevB.33.4557

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Far-infrared properties and characterization of superconducting Nb3Ge

W. B. Cook, S. Perkowitz

DOI 10.1103/PhysRevB.33.4557 · Physical Review B

T1

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Abstract

The transmission and reflection of superconducting films of Nb3Ge have been measured from 20 to 90 cm−1. Analysis using the Drude-Leplae formulation of the ac conductivity yields gap energies of 43 to 54 cm−1 and normal-state electronic scattering times of (0.9–2.1)×10−14 sec, in agreement with independent measurements. These results extend the validity of the Leplae approach for high-Tc strong-coupled materials. The fits to the data also required an assumption of film inhomogene- ity, exploiting the large penetration depth of far-infrared radiation for materials characterization.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	16.1	Pressure not reported	onset
Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	18.4	Pressure not reported	onset
Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20.6	Pressure not reported	onset
Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20.3	Pressure not reported	onset
Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20.2	Pressure not reported	onset
Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	23	Pressure not reported	unknown
V3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	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