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Far-Infrared Conductivity Measurements of Pair Breaking in Superconducting Nb0.5Ti0.5N Thin Films Induced by an External Magnetic Field

Xiaoxiang Xi, J. Hwang, C. Martin, D. B. Tanner, G. L. Carr

DOI 10.1103/PhysRevLett.105.257006 · Physical Review Letters

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Abstract

We report the complex optical conductivity of a superconducting thin film of Nb0.5Ti0.5N in an external magnetic field. The field was applied parallel to the film surface and the conductivity extracted from far-infrared transmission and reflection measurements. The real part shows the superconducting gap, which we observe to be suppressed by the applied magnetic field. We compare our results with the pair-breaking theory of Abrikosov and Gor’kov and confirm directly the theory’s validity for the optical conductivity.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
Nb0.5Ti0.5N

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12Pressure not reportedunknown

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