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Superconducting insulators and localization of Cooper pairs

Arutyunov, Konstantin Y.; Lehtinen, Janne S.; Radkevich, Alexey; Semenov, Andrew G.; Zaikin, Andrei D. 1
1 Institut für Quantenmaterialien und -technologien (IQMT), Karlsruher Institut für Technologie (KIT)


Rapid miniaturization of electronic devices and circuits demands profound understanding of fluctuation phenomena at the nanoscale. Superconducting nanowires – serving as important building blocks for such devices – may seriously suffer from fluctuations which tend to destroy long-range order and suppress superconductivity. In particular, quantum phase slips (QPS) proliferating at low temperatures may turn a quasi-one-dimensional superconductor into a resistor or an insulator. Here, we introduce a physical concept of QPS-controlled localization of Cooper pairs that may occur even in uniform nanowires without any dielectric barriers being a fundamental manifestation of the flux-charge duality in superconductors. We demonstrate – both experimentally and theoretically – that deep in the “insulating” state such nanowires actually exhibit non-trivial superposition of superconductivity and weak Coulomb blockade of Cooper pairs generated by quantum tunneling of magnetic fluxons across the wire.

Verlagsausgabe §
DOI: 10.5445/IR/1000135670
Veröffentlicht am 22.07.2021
DOI: 10.1038/s42005-021-00648-7
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2399-3650
KITopen-ID: 1000135670
HGF-Programm 47.12.01 (POF IV, LK 01) Advanced Solid-State Qubits and Qubit Systems
Erschienen in Communications Physics
Verlag Nature Research
Band 4
Heft 1
Seiten 146
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 24.06.2021
Nachgewiesen in Scopus
Web of Science
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