Journal
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume 367, Issue 1-4, Pages 229-233Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4534(01)01023-1
Keywords
SNS junction; supercurrent; h/e periodicity
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We measure the magnetic flux dependence of the supercurrent in diffusive Nb/n-InAs/Nb mesoscopic SNS Josephson junctions with junction length ranging from 220 to 720 nm. In the longer junctions, the modulation periodicity of the maximum supercurrent by magnetic flux is a quantum flux, Phi(0) = h/2e as usual. However, we find that the magnetic flux periodicity becomes twice or 2Phi(0) = h/e when the junction lengths are shorter than 400 urn. (C) 2002 Elsevier Science B.V. All rights reserved.
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