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Josephson current and multiple Andreev reflections in graphene SNS junctions
Open accessAbstract
The Josephson effect and superconducting proximity effect were observed in superconductor-graphene-superconductor (SGS) Josephson junctions with coherence lengths comparable to the distance between the superconducting leads. By comparing the measured gate dependence of the proximity induced subgap features (multiple Andreev reflections) and of the supercurrent to theoretical predictions, we find that the diffusive junction model yields close quantitative agreement with the results. By contrast, predictions of the ballistic SGS model are inconsistent with the data. We show that all SGS devices reported so far, our own as well as those of other groups, fall in the diffusive junction category. This is attributed to substrate induced potential fluctuations due to trapped charges and to the invasiveness of the metallic leads.
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Cites
The electronic properties of graphene
Castro Neto, A. H., Guinea, F., Peres, N. M. R., Novoselov, K. S., & Geim, A. K. (2009) · Reviews of Modern Physics · doi:10.1103/revmodphys.81.109 · Cited by 24,803
Two-dimensional gas of massless Dirac fermions in graphene
Novoselov, K. S., Geim, A. K., Morozov, S. V., Jiang, D., Katsnelson, M. I., Grigorieva, I. V., Dubonos, S. V., & Firsov, A. A. (2005) · Nature · doi:10.1038/nature04233 · Cited by 21,611
Experimental observation of the quantum Hall effect and Berry's phase in graphene
Zhang, Y., Tan, Y.-W., Stormer, H. L., & Kim, P. (2005) · Nature · doi:10.1038/nature04235 · Cited by 13,435
Cited by
Colloquium : Andreev reflection and Klein tunneling in graphene
Beenakker, C. W. J. (2008) · Reviews of Modern Physics · doi:10.1103/revmodphys.80.1337 · Cited by 1,302
Thompson, M. D., Ben Shalom, M., Geim, A. K., Matthews, A. J., White, J., Melhem, Z., Pashkin, Y. A., Haley, R. P., & Prance, J. R. (2017) · Applied Physics Letters · doi:10.1063/1.4981904 · Cited by 16
Scalable, tunable Josephson junctions and DC SQUIDs based on CVD graphene
Li, T., Gallop, J. C., Hao, L., & Romans, E. J. (2019) · IEEE Transactions on Applied Superconductivity · doi:10.1109/tasc.2019.2897999 · Cited by 6
Metadata
- Authors
- Du, X., Skachko, I., & Andrei, E. Y.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2008-05-09
- Volume
- 77
- Issue
- 18
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W2156841289
- Cited by
- 278
- References
- 3
- FWCI
- 17.88
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Du, X., Skachko, I., & Andrei, E. Y. (2008). Josephson current and multiple Andreev reflections in graphene SNS junctions. Physical Review B. https://doi.org/10.1103/physrevb.77.184507
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
