Quasiparticle tunnel electroresistance in superconducting junctions.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
31 Jan 2020
31 Jan 2020
Historique:
received:
26
06
2019
accepted:
30
12
2019
entrez:
2
2
2020
pubmed:
2
2
2020
medline:
2
2
2020
Statut:
epublish
Résumé
The term tunnel electroresistance (TER) denotes a fast, non-volatile, reversible resistance switching triggered by voltage pulses in ferroelectric tunnel junctions. It is explained by subtle mechanisms connected to the voltage-induced reversal of the ferroelectric polarization. Here we demonstrate that effects functionally indistinguishable from the TER can be produced in a simpler junction scheme-a direct contact between a metal and an oxide-through a different mechanism: a reversible redox reaction that modifies the oxide's ground-state. This is shown in junctions based on a cuprate superconductor, whose ground-state is sensitive to the oxygen stoichiometry and can be tracked in operando via changes in the conductance spectra. Furthermore, we find that electrochemistry is the governing mechanism even if a ferroelectric is placed between the metal and the oxide. Finally, we extend the concept of electroresistance to the tunnelling of superconducting quasiparticles, for which the switching effects are much stronger than for normal electrons. Besides providing crucial understanding, our results provide a basis for non-volatile Josephson memory devices.
Identifiants
pubmed: 32005810
doi: 10.1038/s41467-020-14379-w
pii: 10.1038/s41467-020-14379-w
pmc: PMC6994500
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
658Subventions
Organisme : EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)
ID : 647100
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-15-CE24-0008-01
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