Asymmetric Little–Parks oscillations in full shell double nanowires

Abstract Little–Parks oscillations of a hollow superconducting cylinder are of interest for flux-driven topological superconductivity in single Rashba nanowires. The oscillations are typically symmetric in the orientation of the applied magnetic flux. Using double InAs nanowires coated by an epitaxi...

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Main Authors:	Alexandros Vekris, Juan Carlos Estrada Saldaña, Joeri de Bruijckere, Sara Lorić, Thomas Kanne, Mikelis Marnauza, Dags Olsteins, Jesper Nygård, Kasper Grove-Rasmussen
Format:	Article
Language:	English
Published:	Nature Publishing Group 2021-09-01
Series:	Scientific Reports
Online Access:	https://doi.org/10.1038/s41598-021-97780-9

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spelling	doaj-738d125287c74871ac015ae68c87f6502021-09-26T11:30:07ZengNature Publishing GroupScientific Reports2045-23222021-09-011111810.1038/s41598-021-97780-9Asymmetric Little–Parks oscillations in full shell double nanowiresAlexandros Vekris0Juan Carlos Estrada Saldaña1Joeri de Bruijckere2Sara Lorić3Thomas Kanne4Mikelis Marnauza5Dags Olsteins6Jesper Nygård7Kasper Grove-Rasmussen8Center for Quantum Devices, Niels Bohr Institute, University of CopenhagenCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenKavli Institute of Nanoscience, Delft University of TechnologyCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenCenter for Quantum Devices, Niels Bohr Institute, University of CopenhagenAbstract Little–Parks oscillations of a hollow superconducting cylinder are of interest for flux-driven topological superconductivity in single Rashba nanowires. The oscillations are typically symmetric in the orientation of the applied magnetic flux. Using double InAs nanowires coated by an epitaxial superconducting Al shell which, despite the non-centro-symmetric geometry, behaves effectively as one hollow cylinder, we demonstrate that a small misalignment of the applied parallel field with respect to the axis of the nanowires can produce field-asymmetric Little–Parks oscillations. These are revealed by the simultaneous application of a magnetic field perpendicular to the misaligned parallel field direction. The asymmetry occurs in both the destructive regime, in which superconductivity is destroyed for half-integer quanta of flux through the shell, and in the non-destructive regime, where superconductivity is depressed but not fully destroyed at these flux values.https://doi.org/10.1038/s41598-021-97780-9
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Alexandros Vekris Juan Carlos Estrada Saldaña Joeri de Bruijckere Sara Lorić Thomas Kanne Mikelis Marnauza Dags Olsteins Jesper Nygård Kasper Grove-Rasmussen
spellingShingle	Alexandros Vekris Juan Carlos Estrada Saldaña Joeri de Bruijckere Sara Lorić Thomas Kanne Mikelis Marnauza Dags Olsteins Jesper Nygård Kasper Grove-Rasmussen Asymmetric Little–Parks oscillations in full shell double nanowires Scientific Reports
author_facet	Alexandros Vekris Juan Carlos Estrada Saldaña Joeri de Bruijckere Sara Lorić Thomas Kanne Mikelis Marnauza Dags Olsteins Jesper Nygård Kasper Grove-Rasmussen
author_sort	Alexandros Vekris
title	Asymmetric Little–Parks oscillations in full shell double nanowires
title_short	Asymmetric Little–Parks oscillations in full shell double nanowires
title_full	Asymmetric Little–Parks oscillations in full shell double nanowires
title_fullStr	Asymmetric Little–Parks oscillations in full shell double nanowires
title_full_unstemmed	Asymmetric Little–Parks oscillations in full shell double nanowires
title_sort	asymmetric little–parks oscillations in full shell double nanowires
publisher	Nature Publishing Group
series	Scientific Reports
issn	2045-2322
publishDate	2021-09-01
description	Abstract Little–Parks oscillations of a hollow superconducting cylinder are of interest for flux-driven topological superconductivity in single Rashba nanowires. The oscillations are typically symmetric in the orientation of the applied magnetic flux. Using double InAs nanowires coated by an epitaxial superconducting Al shell which, despite the non-centro-symmetric geometry, behaves effectively as one hollow cylinder, we demonstrate that a small misalignment of the applied parallel field with respect to the axis of the nanowires can produce field-asymmetric Little–Parks oscillations. These are revealed by the simultaneous application of a magnetic field perpendicular to the misaligned parallel field direction. The asymmetry occurs in both the destructive regime, in which superconductivity is destroyed for half-integer quanta of flux through the shell, and in the non-destructive regime, where superconductivity is depressed but not fully destroyed at these flux values.
url	https://doi.org/10.1038/s41598-021-97780-9
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Asymmetric Little–Parks oscillations in full shell double nanowires

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