Detecting Fulde-Ferrell superconductors by an Andreev interferometer

We propose an Andreev interferometer, based on a branched Y-junction, to detect the finite momentum pairing in Fulde-Ferrell (FF) superconductors. In this interferometer, the oscillation of subgap conductance is a unique function of phase difference between the two channels of the Y-junction, which...

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Bibliographic Details
Published in:New journal of physics 2014-08, Vol.16 (8), p.83024-14
Main Authors: Chen, Wei, Gong, Ming, Shen, R, Xing, D Y
Format: Article
Language:English
Subjects:
73.23.-b
74.45.+c
74.81.-g
Andreev interferometer
Branched
Channels
Conductance
Cooper pairs
Fulde-Ferrell superconductors
Interferometers
Mathematical analysis
Momentum
Order parameters
Oscillations
Phase modulation
Physics
Resistance
superconducting proximity effect
Superconductor junctions
Superconductors
Y junctions
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Summary:We propose an Andreev interferometer, based on a branched Y-junction, to detect the finite momentum pairing in Fulde-Ferrell (FF) superconductors. In this interferometer, the oscillation of subgap conductance is a unique function of phase difference between the two channels of the Y-junction, which is determined by the phase modulation of the order parameter in the FF superconductors. This interferometer has the potential not only to determine the magnitude but also the direction of the momentum of Cooper pairs in the FF superconductor. The possible applications of the interferometer in the identification of the finite momentum pairing in non-centrosymmetric superconductors are also discussed.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/16/8/083024