Calculation and measurement of critical temperature in thin superconducting multilayers

Abstract

We have applied the Usadel equations to thin-film multilayer superconductors, and have calculated the critical temperature for general thin-film S-S' bilayer. We extended the bilayer calculation to general thin-film multilayers. The model demonstrates excellent fit with experimental data obtained from Ti-Al bilayers of varying thicknesses.

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• Nonlinear Properties of Supercurrent-Carrying Single and Multi-Layer Thin-Film Superconductors
• Controlling $T_c$ of Iridium Films Using the Proximity Effect
• Nonlinear mechanisms in Al and Ti superconducting travelling-wave parametric amplifiers
• Characterization of Asymmetric Gap-Engineered Josephson Junctions and 3D Transmon Qubits
• Suppressed-gap millimetre wave kinetic inductance detectors using DC-bias current
• Enhanced Athermal Phonon Responsivity in a Kinetic Inductance Detector with Integrated Phonon Collectors
• First Characterization of a Superconducting Filter-bank Spectrometer for Hyper-spectral Microwave Atmospheric Sounding with Transition Edge Sensors
• On the Applicability Ranges of Tc Formulas for Proximity-Coupled Thin SN and SS Bilayers