Josephson tunneling in high-$T_c$ superconductors

Abstract

This article describes the Josephson tunneling from time-reversal symmetry-breaking states and compares it with that from time-reversal invariant states for both twinned and untwinned crystals and for both $c$-axis and basal-plane currents, in a model for orthorhombic YBCO. A macroscopic invariance group describing the superconducting state of a twinned crystal is introduced and shown to provide a useful framework for the discussion of the results for twinned crystals. In addition, a ring geometry, which allows $s$-wave and $d_{x^2-y^2}$-wave superconductivity in a tetragonal superconductor to be distinguished on the basis of symmetry arguments only, is proposed and analyzed. Finally, an appendix gives details of the experimental Josephson tunneling evidence for a superconducting state of orthorhombic $u{x}^2+v{y}^2$ symmetry in YBCO.

Latex File, 18 pages, 6 Postscript figures, submitted to Phys. Rev. B

References in corpus (5)

• Correlated Electrons in High Temperature Superconductors
• Fractional Vortices as Evidence of Time-Reversal Symmetry Breaking in High-Temperature Superconductors
• On the Josephson Coupling between a disk of one superconductor and a surrounding superconducting film of a different symmetry
• Effect of Proximity Coupling of Chains and Planes on the Penetration Depth Anisotropy in Y_1Ba_2Cu_3O_7
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• Mesoscopic Phase Separation in Anisotropic Superconductors
• Quasiclassical theory of twin boundaries in High-T_c superconductors
• Large Second-Order Josephson Effect in Planar Superconductor-Semiconductor Junctions
• Probing the order parameter symmetry in the cuprate high temperature superconductors by SQUID microscopy
• Landau Ginzburg theory of the d-wave Josephson junction
• Probing interfacial pair breaking in tunnel junctions based on the first and the second harmonics of the Josephson current
• Asymmetric magnetic interference patterns in 0-pi Josephson junctions
• Magnetic-interference patterns in Josephson junctions with d+is symmetry
• Phase-Sensitive Tetracrystal Pairing-Symmetry Measurements and Broken Time-Reversal Symmetry States of High Tc Superconductors
• Mechanism for Magnetic Flux Generation in Grain Boundaries of YBCO
• Bi-continuum modelling of layered structures and crystalline interfaces