Weak-Link Physics in the Dynamical Response of Transition-Edge Sensors

Journal article (2023)

Authors

M. Kounalakis QN/Blanter Group - AS , Kavli institute of nanoscience Delft
L Gottardi SRON Netherlands Institute for Space Research
Martin de Wit SRON Netherlands Institute for Space Research
Y.M. Blanter QN/Blanter Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Blanter Group (AS) (TU Delft)
Copyright: © 2023 M. Kounalakis, Luciano Gottardi, Martin De Wit, Y.M. Blanter
DOI: https://doi.org/10.1103/PhysRevApplied.20.024017
More Info
expand_more

Published Date

2023

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Blanter Group

Abstract

We theoretically predict and experimentally observe the onset of weak-link physics in the dynamical response of transition-edge sensors (TESs). We develop a theoretical framework based on a Fokker-Planck description that incorporates both the TESs electrical response, stemming from Josephson phenomena, and the electrothermal effects due to coupling to a thermal bath. Our measurements of a varying dynamic resistance are in excellent agreement with our theory, thereby establishing weak-link phenomena as the main mechanism underlying the operation of TESs. Furthermore, our description enables the calculation of power spectral densities, paving the way for a more thorough investigation of the unexplained "excess noise"in long diffusive junctions and TESs reported in recent experiments.