Effects of Interlayer Interaction on the Superconducting State in YBCO

Abstract

For a two layer system in a weak coupling BCS formalism any interlayer interaction, regardless of its sign, enhances the critical temperature. The sign has an effect upon the relative phase of the order parameter in each of the two planes but not upon its magnitude. When one of the planes has a dispersion consistent with CuO chains and no intrinsic pairing interaction there is both an enhancement of the critical temperature and an s+d mixing in both layers as the interlayer interaction is increased. The magnetic penetration depth, c-axis Josephson tunneling, density of states and Knight shift are calculated for several sets of model parameters.

Small changes in response to referee and other minor changes; 10 pages + 5 figures in ReVTeX with epsf to embed figures.

References in corpus (4)

• Coupling between planes and chains in YBa2Cu3O7 : a possible solution for the order parameter controversy
• s-wave superconductivity from antiferromagnetic spin-fluctuation model for bilayer materials
• Superfluid anisotropy in YBCO: Evidence for pair tunneling superconductivity
• Superconducting Order Parameter in Bi-Layer Cuprates: Occurrence of $\pi$ Phase Shifts in Corner Junctions

Cited by in corpus (14)

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• c-axis Josephson Tunnelling in Twinned and Untwinned YBCO-Pb Junctions
• Theory of (001) surface and bulk states in Y${}_{1-y}$Ca${}_y$Ba${}_2$Cu${}_3$O${}_{7-\delta }$}
• Triplanar Model for the Gap and Penetration Depth in YBCO
• Modulation of Superconducting Properties by Ferroelectric Polarization in Confined FE-S-FE Films
• Magnetic field effects on the density of states of orthorhombic superconductors
• Magnetic correlations on the full chains of Ortho-II YBa${}_2$Cu${}_3$O${}_{6.5}$
• The c axis optical conductivity of layered systems in the superconducting state
• Magnetic field as a probe of gap energy scales in YBCO
• Effect of Interband Transitions on the c axis Penetration Depth of Layered Superconductors
• Two-electron bound state formation in the t-J-U model for exchange-coupled planes
• Absence of anisotropic universal transport in YBCO