1996/04/16 by W. Atkinson, Atkinson, W., J. P. Carbotte +3
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9604104
To appear in the proceeding of the BICAS Summer School on ``Symmetry of the Order Parameter in High-Temperature Superconductors.'' See also cond-mat/9506125 and cond-mat/9604049 . 16 pages with 14 figures, LaTeX+epsf, tar'd, gzip'd and uuencode'd
arxiv created 1996/04/16 · arxiv updated 2009/11/30
The zero temperature in plane penetration depth in an untwinned single crystal of optimally doped YBa2Cu3O6.93 is highly anisotropic. This fact has been interpreted as evidence that a large amount of the condensate resides in the chains. On the other hand, the temperature dependence of lambdaa(T)/lambdaa(0) and lambdab(T)/lambdab(0) (where the b-direction is along the chains) are not very different. This constrains theories and is, in particular, difficult to understand within a proximity model with d-wave pairing only in the CuO2 plane and none on the CuO chains but instead supports a more three dimensional models with interplane interactions.