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Superconductor-insulator transition in capacitively coupled superconducting nanowires

Latyshev, A.; Semenov, A. G.; Zaikin, Andrei D.

We investigate superconductor–insulator quantum phase transitions in ultrathin capacitively coupled superconducting nanowires with proliferating quantum phase slips. We derive a set of coupled Berezinskii–Kosterlitz–Thouless-like renormalization group equations demonstrating that interaction between quantum phase slips in one of the wires gets modified due to the effect of plasma modes propagating in another wire. As a result, the superconductor–insulator phase transition in each of the wires is controlled not only by its own parameters but also by those of the neighboring wire as well as by mutual capacitance. We argue that superconducting nanowires with properly chosen parameters may turn insulating once they are brought sufficiently close to each other.

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Verlagsausgabe §
DOI: 10.5445/IR/1000125473
Veröffentlicht am 03.11.2020
DOI: 10.3762/BJNANO.11.124
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2190-4286
KITopen-ID: 1000125473
Erschienen in Beilstein journal of nanotechnology
Band 11
Seiten 1402-1408
Vorab online veröffentlicht am 14.09.2020
Schlagwörter quantum phase slips; quantum phase transitions; RG equations
Nachgewiesen in Scopus
Web of Science
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