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Supercurrent transport through 1e -periodic full-shell Coulomb islands

Razmadze, D. ; Souto, R. Seoane LU orcid ; O'Farrell, E. C.T. ; Krogstrup, P. ; Leijnse, M. LU ; Marcus, C. M. and Vaitiekėnas, S. (2024) In Physical Review B 109(4).
Abstract

We experimentally investigate supercurrent through Coulomb islands, where island and leads are fabricated from semiconducting nanowires with fully surrounding superconducting shells. Applying flux along the wire yields a series of destructive Little-Parks lobes with reentrant supercurrent. We find Coulomb blockade with 2e peak spacing in the zeroth lobe and 1e average spacing, with regions of significant even-odd modulation, in the first lobe. Evolution of Coulomb-peak amplitude through the first lobe is consistent with a theoretical model of supercurrent carried predominantly by zero-energy states in the leads and the island.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
109
issue
4
article number
L041302
publisher
American Physical Society
external identifiers
  • scopus:85184146518
ISSN
2469-9950
DOI
10.1103/PhysRevB.109.L041302
language
English
LU publication?
yes
id
d61e7ce1-5e01-4cc9-bb33-42f915b4ce65
date added to LUP
2024-02-29 13:37:34
date last changed
2024-02-29 13:39:44
@article{d61e7ce1-5e01-4cc9-bb33-42f915b4ce65,
  abstract     = {{<p>We experimentally investigate supercurrent through Coulomb islands, where island and leads are fabricated from semiconducting nanowires with fully surrounding superconducting shells. Applying flux along the wire yields a series of destructive Little-Parks lobes with reentrant supercurrent. We find Coulomb blockade with 2e peak spacing in the zeroth lobe and 1e average spacing, with regions of significant even-odd modulation, in the first lobe. Evolution of Coulomb-peak amplitude through the first lobe is consistent with a theoretical model of supercurrent carried predominantly by zero-energy states in the leads and the island.</p>}},
  author       = {{Razmadze, D. and Souto, R. Seoane and O'Farrell, E. C.T. and Krogstrup, P. and Leijnse, M. and Marcus, C. M. and Vaitiekėnas, S.}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  number       = {{4}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Supercurrent transport through 1e -periodic full-shell Coulomb islands}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.109.L041302}},
  doi          = {{10.1103/PhysRevB.109.L041302}},
  volume       = {{109}},
  year         = {{2024}},
}