&lt;title&gt;Chain-plane coupling in YBa&lt;formula&gt;&lt;inf&gt;&lt;roman&gt;2&lt;/roman&gt;&lt;/inf&gt;&lt;/formula&gt;Cu&lt;formula&gt;&lt;inf&gt;&lt;roman&gt;3&lt;/roman&gt;&lt;/inf&gt;&lt;/formula&gt;O&lt;formula&gt;&lt;inf&gt;&lt;roman&gt;7&lt;/roman&gt;&lt;/inf&gt;&lt;/formula&gt;&lt;/title&gt;

William A Atkinson,Jules P Carbotte

doi:10.1117/12.241789

Abstract

The purpose of this work is to discus the role that coupling between the CuO chains and CuO2 planes in YBa2Cu3O7 plays in the superconducting state. The important issue is the structure and magnitude of the superconducting gap in the chains. We discuss a simple pairing interaction -- in which a boson is exchanged between the planes and chains -- which leads to a gap in the chains that is larger than would be found in a simple proximity model of superconductivity. The interlayer pairing interaction has an s-wave symmetry which overwhelms the intrinsic d-wave gap in the planes when the interlayer interaction is large. The limitation that this imposes is important, as it restricts the size of gap in the chains. We compare this model with other models of interlayer pairing.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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