Nature Nanotechnology, volume 10, issue 9, pages 761-764
Ballistic Josephson junctions in edge-contacted graphene
V. E. Calado
1
,
S. Goswami
1
,
G Nanda
1
,
M. Diez
2
,
A R Akhmerov
1
,
Kenji Watanabe
3
,
T. Taniguchi
3
,
T.M. KLAPWIJK
1, 4
,
L M K Vandersypen
1
3
Publication type: Journal Article
Publication date: 2015-07-27
Journal:
Nature Nanotechnology
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 38.3
ISSN: 17483387, 17483395
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
General Materials Science
Electrical and Electronic Engineering
Bioengineering
Biomedical Engineering
Abstract
Heterostructures of graphene and a superconducting metal allow Josephson junctions to be studied in a regime characterized by ballistic transport. Hybrid graphene–superconductor devices have attracted much attention since the early days of graphene research1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18. So far, these studies have been limited to the case of diffusive transport through graphene with poorly defined and modest-quality graphene/superconductor interfaces, usually combined with small critical magnetic fields of the superconducting electrodes. Here, we report graphene-based Josephson junctions with one-dimensional edge contacts19 of molybdenum rhenium. The contacts exhibit a well-defined, transparent interface to the graphene, have a critical magnetic field of 8 T at 4 K, and the graphene has a high quality due to its encapsulation in hexagonal boron nitride19,20. This allows us to study and exploit graphene Josephson junctions in a new regime, characterized by ballistic transport. We find that the critical current oscillates with the carrier density due to phase-coherent interference of the electrons and holes that carry the supercurrent caused by the formation of a Fabry–Pérot cavity. Furthermore, relatively large supercurrents are observed over unprecedented long distances of up to 1.5 μm. Finally, in the quantum Hall regime we observe broken symmetry states while the contacts remain superconducting. These achievements open up new avenues to exploit the Dirac nature of graphene in interaction with the superconducting state.
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Citations by publishers
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70
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American Physical Society (APS)
70 publications, 34.83%
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Springer Nature
34 publications, 16.92%
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Wiley
6 publications, 2.99%
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5 publications, 2.49%
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IEEE
4 publications, 1.99%
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3 publications, 1.49%
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2 publications, 1%
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Stichting SciPost
2 publications, 1%
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Proceedings of the National Academy of Sciences (PNAS)
2 publications, 1%
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SPIE
1 publication, 0.5%
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American Vacuum Society
1 publication, 0.5%
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Materials Research Society
1 publication, 0.5%
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1 publication, 0.5%
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Pleiades Publishing
1 publication, 0.5%
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Taylor & Francis
1 publication, 0.5%
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Oxford University Press
1 publication, 0.5%
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Chinese Physical Society
1 publication, 0.5%
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Treatise
1 publication, 0.5%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Calado V. E. et al. Ballistic Josephson junctions in edge-contacted graphene // Nature Nanotechnology. 2015. Vol. 10. No. 9. pp. 761-764.
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Calado V. E., Goswami S., Nanda G., Diez M., Akhmerov A. R., Watanabe K., Taniguchi T., KLAPWIJK T., Vandersypen L. M. K. Ballistic Josephson junctions in edge-contacted graphene // Nature Nanotechnology. 2015. Vol. 10. No. 9. pp. 761-764.
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TY - JOUR
DO - 10.1038/nnano.2015.156
UR - https://doi.org/10.1038/nnano.2015.156
TI - Ballistic Josephson junctions in edge-contacted graphene
T2 - Nature Nanotechnology
AU - Calado, V. E.
AU - Goswami, S.
AU - Nanda, G
AU - Diez, M.
AU - Akhmerov, A R
AU - Watanabe, Kenji
AU - Taniguchi, T.
AU - KLAPWIJK, T.M.
AU - Vandersypen, L M K
PY - 2015
DA - 2015/07/27 00:00:00
PB - Springer Nature
SP - 761-764
IS - 9
VL - 10
SN - 1748-3387
SN - 1748-3395
ER -
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@article{2015_Calado,
author = {V. E. Calado and S. Goswami and G Nanda and M. Diez and A R Akhmerov and Kenji Watanabe and T. Taniguchi and T.M. KLAPWIJK and L M K Vandersypen},
title = {Ballistic Josephson junctions in edge-contacted graphene},
journal = {Nature Nanotechnology},
year = {2015},
volume = {10},
publisher = {Springer Nature},
month = {jul},
url = {https://doi.org/10.1038/nnano.2015.156},
number = {9},
pages = {761--764},
doi = {10.1038/nnano.2015.156}
}
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Calado, V. E., et al. “Ballistic Josephson junctions in edge-contacted graphene.” Nature Nanotechnology, vol. 10, no. 9, Jul. 2015, pp. 761-764. https://doi.org/10.1038/nnano.2015.156.