Electronic Transport in Double-Nanowire Superconducting Islands with Multiple Terminals

Alexandros Vekris, Juan Carlos Estrada Saldaña, Thomas Kanne, Thor Hvid-Olsen, Mikelis Marnauza, Dags Olsteins, Matteo M. Wauters, Michele Burrello, Jesper Nygård, Kasper Grove-Rasmussen*

*Corresponding author for this work

Research output: Contribution to journalLetterResearchpeer-review

6 Citations (Scopus)

Abstract

We characterize in situ grown parallel nanowires bridged by a superconducting island. The magnetic-field and temperature dependence of Coulomb blockade peaks measured across different pairs of nanowire ends suggest the presence of a subgap state extended over the hybrid parallel-nanowire island. Being gate-tunable, accessible by multiple terminals, and free of quasiparticle poisoning, these nanowires show promise for the implementation of several proposals that rely on parallel nanowire platforms.

Original languageEnglish
JournalNano Letters
Volume22
Issue number14
Pages (from-to)5765-5772
Number of pages8
ISSN1530-6984
DOIs
Publication statusPublished - 27 Jul 2022

Bibliographical note

Funding Information:
We thank Karsten Flensberg for valuable discussions and Rubén Seoane Souto for sharing his theoretical analysis of the subgap state signatures in the transport of blockaded multiterminal devices. We acknowledge the support of the Sino-Danish Center, Villum Foundation (Research Grant 25310), the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska–Curie Grant Agreements 832645 “SpinScreen” and 847523 “INTERACTIONS”, QuantERA SuperTop (NN 127900), the European Union’s Horizon 2020 research and innovation program FETOpen Grant 828948 (AndQC), the Danish National Research Foundation, Carlsberg Foundation, and the Independent Research Fund Denmark.

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

Keywords

  • multiterminal
  • nanowire
  • subgap states
  • superconducting island
  • superconductivity

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