About tunneling of pairs of the cooper pairs through the Josephson junctions in exotic superconductors

Within the framework of the Bose–Einstein condensation (BEC) model, the possibility of tunneling of pairs of the Cooper pairs (the Bose 4 e condensate) through Josephson junctions (JJ) in exotic superconductors is analyzed. It is demonstrated that the 4 e supercurrent transport through the JJ leads...

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Bibliographic Details
Published in:Russian physics journal 2012-06, Vol.55 (1), p.84-91
Main Author: Sergeyev, D. M.
Format: Article
Language:English
Subjects:
Analysis
Audio equipment industry
Condensed Matter Physics
Hadrons
Heavy Ions
Lasers
Mathematical and Computational Physics
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Superconductors
Theoretical
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Summary:Within the framework of the Bose–Einstein condensation (BEC) model, the possibility of tunneling of pairs of the Cooper pairs (the Bose 4 e condensate) through Josephson junctions (JJ) in exotic superconductors is analyzed. It is demonstrated that the 4 e supercurrent transport through the JJ leads to a deviation of the supercurrent from the standard harmonic pattern. Based on the hypothesis of 4 e supercurrent transport, the occurrence of half-integer Shapiro steps on the JJ volt-ampere characteristic (VAC) with unharmonic current–phase relationship (CPR) under application of HF or microwave signals and the occurrence of pseudo-minima in the supercurrent dependence on the magnetic flux normalized by fluxoid is interpreted at half-integer Ф Ф 0 values.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-012-9779-4