Details

Autor(en) / Beteiligte

• Gordeeva, A V
• Pankratov, A L
• Pugach, N G
• Vasenko, A S
• Zbrozhek, V O
• Blagodatkin, A V
• Pimanov, D A
• Kuzmin, L S

Titel

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

Ist Teil von

• Scientific reports, 2020-12, Vol.10 (1), p.21961-10, Article 21961

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2020

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.