Determining transport parameters for superconductor/normal metal point contacts at fixed temperature from conductance versus magnetic field data |
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Authors: | CW Smith PJ Dolan |
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Institution: | 1. Department of Physics and Astronomy, University of Maine, Orono, ME 04469-5709, USA;2. Department of Physics, Northeastern Illinois University, Chicago, IL 60625-4699, USA |
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Abstract: | Transport data for superconductor/normal metal point contacts often consists of normalized conductance versus applied voltage as a function of reduced temperature, from which the barrier parameter, Z, and the broadening parameter, Γ, for the contact can be determined, in addition to other features of interest. We present a new strategy for determining these parameters, namely from normalized conductance as a function of applied magnetic field at fixed temperature, even when conductance versus variable temperature data is absent. This analysis technique will be demonstrated for several point contacts, over a wide range of parameter values. |
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