Publication: Josephson effect in graphene: Comparison of real and pseudo vector potential barriers
Issued Date
2014-01-01
Resource Type
ISSN
17413540
0256307X
0256307X
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2-s2.0-84896320413
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Mahidol University
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SCOPUS
Bibliographic Citation
Chinese Physics Letters. Vol.31, No.3 (2014)
Suggested Citation
Tatnatchai Suwannasit, Rassmidara Hoonsawat, I. Ming Tang, Bumned Soodchomshom Josephson effect in graphene: Comparison of real and pseudo vector potential barriers. Chinese Physics Letters. Vol.31, No.3 (2014). doi:10.1088/0256-307X/31/3/037401 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/34928
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Title
Josephson effect in graphene: Comparison of real and pseudo vector potential barriers
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Abstract
The Josephson currents through real vector potential (RVP) and pseudo vector potential (PVP) barriers in graphene are investigated. In graphene, the pseudo vector potential may be caused by a local strain. The comparison of supercurrents induced by the two type-barriers is focused. As a result, we find that not only will the RVP induce a transition Josephson current from the 0 → π state but also causes the difference in the phases of the order parameters of the two superconducting graphene layers to shift from φ → φ. The critical current is PVP-independent around the neutrality point while it strongly depends on the RVP. The vector potential dependence of critical current is found to be perfectly linear for both PVP and RVP barriers. © 2014 Chinese Physical Society and IOP Publishing Ltd.