Tunable Superconducting Properties of a-NbSi Thin Films and Application to Detection in Astrophysics
O. Crauste, C. A. Marrache-Kikuchi, L. Berge, S. Collin, Y., Dolgorouky, S. Marnieros, C. Nones, L. Dumoulin
TL;DR
This paper investigates amorphous NbxSi1-x thin films with tunable superconducting properties, highlighting their potential use in astrophysical detectors like bolometers for CMB radiation due to adjustable resistance and critical temperature.
Contribution
It demonstrates the ability to independently tune the normal-state resistance and critical temperature of NbxSi1-x films for specific astrophysical applications.
Findings
Films have adjustable normal-state resistance and critical temperature.
Low electron-phonon coupling makes them suitable for bolometers.
Devices can be designed for both high and low impedance readouts.
Abstract
We report on the superconducting properties of amorphous NbxSi1-x thin films. The normal-state resistance and critical temperatures can be separately adjusted to suit the desired application. Notably, the relatively low electron-phonon coupling of these films makes them good candidates for an "all electron bolometer" for Cosmological Microwave Background radiation detection. Moreover, this device can be made to suit both high and low impedance readouts.
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