Design of structured La$_{2-x}$Sr$_{x}$CuO$_{4}$ films as superconducting transition-edge sensors at 4.2K

M. M. Botana; A. S. Viz; M. V. Ramallo

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arXiv · 2411.19656

Design of structured La$_{2-x}$Sr$_{x}$CuO$_{4}$ films as superconducting transition-edge sensors at 4.2K

M. M. Botana·A. S. Viz·M. V. Ramallo

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Abstract

We calculate the effects of carrier-density structuration and patterning on thin films of the cuprate superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$, in order to optimize its functional characteristics as sensing material for resistive transition-edge bolometers at liquid-He temperature. We perform finite-element computations considering two major contributions to structuration: The intrinsic random nanoscale disorder associated to carrier density nonstoichiometry, plus the imposition of regular arrangements of zones with different nominal carrier densities. Using ad-hoc seek algorithms, we obtain various structuration designs that markedly improve the bolometric performance, mainly the saturation power and dynamic range. Bolometric operation becomes favorable even in the easier-to-implement constant current mode of measurement.

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M. M. Botana, A. S. Viz, M. V. Ramallo. 2024-11-29. Design of structured La$_{2-x}$Sr$_{x}$CuO$_{4}$ films as superconducting transition-edge sensors at 4.2K. https://arxiv.org/abs/2411.19656

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