Orthorhombically Mixed s and d$_{x^2-y^2}$ Wave Superconductivity and Josephson Tunneling

Details Orthorhombically Mixed s and d$_{x^2-y^2}$ Wave Superconductivity and Josephson Tunneling Orthorhombically Mixed s and d$_{x^2-y^2}$ Wave Superconductivity and Josephson Tunneling

1995-10-03

arxiv.org/abs/cond-mat/9510013v1

Physics

Condensed Matter

5 pages, RevTeX file, 1 figure available on request (walker@physics.utoronto.ca)

Scientific paper

10.1103/PhysRevB.53.5835

The effect of orthorhombicity on Josephson tunneling in high T$_c$ superconductors such as YBCO is studied for both single crystals and highly twinned crystals. It is shown that experiments on highly twinned crystals experimentally determine the symmetry of the superconducting twin boundaries (which can be either even or odd with respect to a reflection in the twinning plane). Conversely, Josephson experiments on highly twinned crystals can not experimentally determine whether the superconductivity is predominantly $s$-wave or predominantly $d$-wave. The direct experimental determination of the order-parameter symmetry by Josephson tunneling in YBCO thus comes from the relatively few experiments which have been carried out on untwinned single crystals.

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