Simulations of experimental conductance spectra of $YB{a}_{2}C{u}_3{O}_y$ junctions: Role of a long d-wave decay length and a small $is$ component in the pair potential near the interface

Abstract

Extended BTK-type theoretical methods were used for the calculation of conductance spectra of NS and NIS junctions, where S is either a d-wave or a d+is-wave superconductor, and N is a normal metal. We found that the length scale over which the bulk d-wave order parameter varies spatially near the interface (the "decay length") has a significant effect on the main features of the conductance spectra. A relatively large decay length of the order of 10-20${\xi }_0$ together with a small $is$-wave component, can explain many peculiarities observed in the experimental conductance spectra of various junctions. We attribute the long decay length to either a reversed proximity effect in the high transparency junctions, or to the presence of a low $T_c\le 10$K s-wave component with a much longer ${\xi }_{0s}\approx 10{\xi }_{0d}$ near the interface.

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Cited by in corpus (3)

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• Magnetoresistance of Junctions made of Underdoped YBCO Separated by a Ga-doped YBCO Barrier