Stationary Josephson effect in a short multiterminal junction

Article

关键词: SUPERCONDUCTOR-FERROMAGNET STRUCTURES;    HIGH-FREQUENCY FIELD;    EXCHANGE FIELD;    SUPERCURRENT;    ENHANCEMENT;    BRIDGES;    STATE;   

DOI  :  10.1103/PhysRevB.87.024507

来源: SCIE

【 摘 要 】

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 I-Jz has a sinusoidal dependence on the phase difference phi(z) between the superconductors in the horizontal wire with a critical current I-c that can be varied by changing the phase difference phi(y) between the superconductors in the vertical wire. The period of the function I-Jz (phi(z)) depends on the ratio of the interface resistances R-Sn,R-z/R-Sn,R-y being equal to 2 pi if this ratio is small and equal to 4 pi 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. DOI: 10.1103/PhysRevB.87.024507

【 授权许可】

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