Spontaneous Flux and Magnetic Interference Patterns in 0-pi Josephson Junctions

Details Spontaneous Flux and Magnetic Interference Patterns in 0-pi Josephson Junctions Spontaneous Flux and Magnetic Interference Patterns in 0-pi Josephson Junctions

1997-03-06

arxiv.org/abs/cond-mat/9703067v1

Physics

Condensed Matter

Superconductivity

13 pages, TEX,+ 7 figures, postscript

Scientific paper

10.1103/PhysRevB.56.886

The spontaneous flux generation and magnetic field modulation of the critical current in a 0-pi Josephson junction are calculated for different ratios of the junction length to the Josephson penetration depth, and different ratios of the 0-junction length to the pi-junction length. These calculations apply to a Pb-YBCO c-axis oriented junction with one YBCO twin boundary, as well as other experimental systems. Measurements of such a junction can provide information on the nature of the c-axis Josephson coupling and the symmetry of the order parameter in YBCO. We find spontaneous flux even for very short symmetric 0-pi junctions, but asymmetric junctions have qualitatively different behavior.

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