Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps

Abstract The Cosmic Microwave Background (CMB) radiation is the only observable that allows studying the earliest stage of the Universe. Radioastronomy instruments for CMB investigation require low working temperatures around 100 mK to get the necessary sensitivity. On-chip electron cooling of recei...

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Autores principales:	A. V. Gordeeva, A. L. Pankratov, N. G. Pugach, A. S. Vasenko, V. O. Zbrozhek, A. V. Blagodatkin, D. A. Pimanov, L. S. Kuzmin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/16b0c65663714d3eb48d8ab650478e3d
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id	oai:doaj.org-article:16b0c65663714d3eb48d8ab650478e3d
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spelling	oai:doaj.org-article:16b0c65663714d3eb48d8ab650478e3d2021-12-02T11:57:57ZRecord electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps10.1038/s41598-020-78869-z2045-2322https://doaj.org/article/16b0c65663714d3eb48d8ab650478e3d2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78869-zhttps://doaj.org/toc/2045-2322Abstract The Cosmic Microwave Background (CMB) radiation is the only observable that allows studying the earliest stage of the Universe. Radioastronomy instruments for CMB investigation require low working temperatures around 100 mK to get the necessary sensitivity. On-chip electron cooling of receivers is a pathway for future space missions due to problems of dilution fridges at low gravity. Here, we demonstrate experimentally that in a Cold-Electron Bolometer (CEB) a theoretical limit of electron cooling down to 65 mK from phonon temperature of 300 mK can be reached. It is possible due to effective withdrawing of hot electrons from the tunnel barrier by double stock, special traps and suppression of Andreev Joule heating in hybrid Al/Fe normal nanoabsorber.A. V. GordeevaA. L. PankratovN. G. PugachA. S. VasenkoV. O. ZbrozhekA. V. BlagodatkinD. A. PimanovL. S. KuzminNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. V. Gordeeva A. L. Pankratov N. G. Pugach A. S. Vasenko V. O. Zbrozhek A. V. Blagodatkin D. A. Pimanov L. S. Kuzmin Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
description	Abstract The Cosmic Microwave Background (CMB) radiation is the only observable that allows studying the earliest stage of the Universe. Radioastronomy instruments for CMB investigation require low working temperatures around 100 mK to get the necessary sensitivity. On-chip electron cooling of receivers is a pathway for future space missions due to problems of dilution fridges at low gravity. Here, we demonstrate experimentally that in a Cold-Electron Bolometer (CEB) a theoretical limit of electron cooling down to 65 mK from phonon temperature of 300 mK can be reached. It is possible due to effective withdrawing of hot electrons from the tunnel barrier by double stock, special traps and suppression of Andreev Joule heating in hybrid Al/Fe normal nanoabsorber.
format	article
author	A. V. Gordeeva A. L. Pankratov N. G. Pugach A. S. Vasenko V. O. Zbrozhek A. V. Blagodatkin D. A. Pimanov L. S. Kuzmin
author_facet	A. V. Gordeeva A. L. Pankratov N. G. Pugach A. S. Vasenko V. O. Zbrozhek A. V. Blagodatkin D. A. Pimanov L. S. Kuzmin
author_sort	A. V. Gordeeva
title	Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
title_short	Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
title_full	Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
title_fullStr	Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
title_full_unstemmed	Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
title_sort	record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/16b0c65663714d3eb48d8ab650478e3d
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Record electron self-cooling in cold-electron bolometers with a hybrid superconductor-ferromagnetic nanoabsorber and traps

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