Abstract
We study the dc Josephson effect and the density of states in a multiterminal structure of cross-type geometry that consists of four superconducting electrodes connected by one-dimensional normal or ferromagnetic wires. We find that the Josephson current has a sinusoidal dependence on the phase difference between the superconductors in the horizontal wire with a critical current that can be varied by changing the phase difference between the superconductors in the vertical wire. The period of the function depends on the ratio of the interface resistances being equal to if this ratio is small and equal to in the opposite limit. We also calculate the amplitudes of both the singlet and the odd-frequency triplet components in the system under consideration. The triplet component amplitude may be significantly larger than the amplitude of the singlet component.
1 More- Received 9 August 2012
DOI:https://doi.org/10.1103/PhysRevB.87.024507
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