Theory of c-axis Josephson tunneling in d-wave superconductors

Details Theory of c-axis Josephson tunneling in d-wave superconductors Theory of c-axis Josephson tunneling in d-wave superconductors

2003-01-16

arxiv.org/abs/cond-mat/0301280v1

Physics

Condensed Matter

Superconductivity

Revtex, 4 pages with 4 eps figures, to appear in PRB RC

Scientific paper

10.1103/PhysRevB.67.020510

The temperature and angular dependence of the c-axis Josephson current and the superfluid density in layered d-wave superconductors are studied within the framework of an extended Ambegaokar-Baratoff formalism. In particular, the effects of angle-dependent tunneling matrix elements and Andreev scattering at grain boundaries are taken into account. These lead to strong corrections of the low-temperature behavior of the plasma frequency and the Josephson current. Recent c-axis measurements on the cuprate high-temperature superconductors HgBa_2CaCu_{1+\delta} and Bi_2Sr_2CaCu_2O_{8+\delta} can therefore be interpreted to be consistent with a d-wave order parameter.

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