Abstract
One way of making a transition-edge sensor (TES) is by utilizing the proximity effect, in which the \(T_{C}\) of a superconducting film is reduced with a normal metal film in metallic contact. The \(T_{C}\) of a bilayer TES can be estimated by solving the Usadel equations with given boundary conditions. The classical boundary conditions of a bilayer include a specific interface resistance being temperature-independent. In this paper, we will introduce a temperature-dependent specific interface resistance. By fitting the measured \(T_{C}\) data of Ir/Au bilayers from the literature to a \(T_{C}\) calculation model, we will compare the fit parameters and fit errors with the temperature-dependent specific interface resistance described in this work and with the classical temperature-independent specific interface resistance.
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Acknowledgements
The work at Argonne National Laboratory, including the use of facility at the Center for Nanoscale Materials (CNM), was supported by Office of Science and Office of Basic Energy Sciences of the US Department of Energy, under Contract No. DE-AC02-06CH11357.
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Wang, G., Chang, C.L., Lisovenko, M. et al. Modeling Low-TC Transition-Edge Sensors Made of NS Bilayers: The Specific Interface Resistance. J Low Temp Phys 200, 220–225 (2020). https://doi.org/10.1007/s10909-020-02451-0
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DOI: https://doi.org/10.1007/s10909-020-02451-0