Probing interfacial pair breaking in tunnel junctions based on the first and the second harmonics of the Josephson current
Yu. S. Barash
DOI 10.1103/PhysRevB.85.174529 · Physical Review B
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Abstract
It will be shown that a pronounced interfacial pair breaking can be identified in Josephson tunnel junctions provided the first j1c and the second j2c harmonics of the supercurrent, as well as the depairing current in the bulk jdp, are known. Namely, within the Ginzburg-Landau theory a strong interfacial pair breaking results in the relation j2cjdp≫j1c2, while in standard junctions, with negligibly small pair breaking, the relation of opposite character takes place.
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