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

Abstract

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+δ} and Bi_2Sr_2CaCu_2O_{8+δ} can therefore be interpreted to be consistent with a d-wave order parameter.

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

References in corpus (3)

• d-like Symmetry of the Order Parameter and Intrinsic Josephson Effects in Bi2212 Cross-Whisker Junctions
• A Cross-Whiskers Junction as a Novel Fabrication Process for Intrinsic Josephson Junction
• Out of plane optical conductivity in d-wave superconductors

Cited by in corpus (8)

• Macroscopic Quantum Tunneling and Quasiparticle Dissipation in d-wave Superconductor Josephson Junctions
• The c-axis transport in naturally-grown Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ cross-whisker junctions
• Theory of Macroscopic Quantum Tunneling in High-T_c c-Axis Josephson Junctions
• Supercurrent in Nodal Superconductors
• Intergrain Josephson Currents in Multigap Superconductors: Microscopic Origin of Low Intergrain Critical Current and Its Recovery Potential in Iron-Pnictide Materials
• Josephson effects in twisted nodal superconductors
• Comment on "c-axis Josephson tunneling in $D_{x^2-y^2}$-wave superconductors''
• Nature of c-axis coupling in underdoped Bi2Sr2CaCu2O8 with varying degrees of disorder