Triplanar Model for the Gap and Penetration Depth in YBCO

Abstract

YBaCuO_7 is a trilayer material with a unit cell consisting of a CuO_2 bilayer with a CuO plane of chains in between. Starting with a model of isolated planes coupled through a transverse matrix element, we consider the possibility of intra as well as interplane pairing within a nearly antiferromagnetic Fermi liquid model. Solutions of a set of three coupled BCS equations for the gap exhibit orthorhombic symmetry with s- as well as d-wave contributions. The temperature dependence and a-b in plane anisotropy of the resulting penetration depth is discussed and compared with experiment.

To appear in Physical Review B1 01Mar97; 12 pages with 10 figures; RevTeX+epsf

References in corpus (3)

• Effects of Interlayer Interaction on the Superconducting State in YBCO
• Density of states of a layered S/N d-wave superconductor
• Critical Josephson Current in a Model Pb/YBa_2Cu_3O_7 Junction

Cited by in corpus (5)

• Role of CuO chains in vortex core structure in YBa2Cu3O{7-delta}
• Fermi-Liquid Interactions in d-Wave Superconductor
• Magnetic field effects on the density of states of orthorhombic superconductors
• Magnetic field as a probe of gap energy scales in YBCO
• Absence of anisotropic universal transport in YBCO