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Anomalous modulation of Josephson radiation in nanowire-based Josephson junctions

Kamata, H. ; Deacon, R. S. ; Matsuo, S. ; Li, K. ; Jeppesen, S. LU ; Samuelson, L. LU ; Xu, H. Q. LU ; Ishibashi, K. and Tarucha, S. (2018) In Physical Review B 98(4).
Abstract

We investigate the Josephson radiation of nanowire (NW)-based Josephson junctions in a parallel magnetic field. The Josephson junction made of an InAs NW with superconducting Al leads shows the emission spectra which follow the Josephson frequency over the range 4-8 GHz at zero magnetic field. We observe an apparent deviation of the emission spectra from the Josephson frequency which is accompanied by a strong enhancement of the switching current above a magnetic field of ∼300 mT. The observed modulations can be understood to reflect trivial changes in the superconducting circuit surrounding the device which is strongly affected by the applied magnetic field. Our findings will provide a way to accurately investigate topological... (More)

We investigate the Josephson radiation of nanowire (NW)-based Josephson junctions in a parallel magnetic field. The Josephson junction made of an InAs NW with superconducting Al leads shows the emission spectra which follow the Josephson frequency over the range 4-8 GHz at zero magnetic field. We observe an apparent deviation of the emission spectra from the Josephson frequency which is accompanied by a strong enhancement of the switching current above a magnetic field of ∼300 mT. The observed modulations can be understood to reflect trivial changes in the superconducting circuit surrounding the device which is strongly affected by the applied magnetic field. Our findings will provide a way to accurately investigate topological properties in NW-based systems.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
98
issue
4
article number
041302
publisher
American Physical Society
external identifiers
  • scopus:85050458303
ISSN
2469-9950
DOI
10.1103/PhysRevB.98.041302
language
English
LU publication?
yes
id
61f9f570-3f23-4d7c-9a6a-e16b038281d4
alternative location
https://arxiv.org/pdf/1805.04702.pdf
date added to LUP
2018-08-28 14:29:53
date last changed
2023-11-17 23:04:46
@article{61f9f570-3f23-4d7c-9a6a-e16b038281d4,
  abstract     = {{<p>We investigate the Josephson radiation of nanowire (NW)-based Josephson junctions in a parallel magnetic field. The Josephson junction made of an InAs NW with superconducting Al leads shows the emission spectra which follow the Josephson frequency over the range 4-8 GHz at zero magnetic field. We observe an apparent deviation of the emission spectra from the Josephson frequency which is accompanied by a strong enhancement of the switching current above a magnetic field of ∼300 mT. The observed modulations can be understood to reflect trivial changes in the superconducting circuit surrounding the device which is strongly affected by the applied magnetic field. Our findings will provide a way to accurately investigate topological properties in NW-based systems.</p>}},
  author       = {{Kamata, H. and Deacon, R. S. and Matsuo, S. and Li, K. and Jeppesen, S. and Samuelson, L. and Xu, H. Q. and Ishibashi, K. and Tarucha, S.}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{4}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Anomalous modulation of Josephson radiation in nanowire-based Josephson junctions}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.98.041302}},
  doi          = {{10.1103/PhysRevB.98.041302}},
  volume       = {{98}},
  year         = {{2018}},
}