Direct Correlation between Tc and CuO2 Bilayer Spacing in YBa2Cu3O7-x

M. Varela; D Arias; Z. Sefrioui; C. Leon; C. Ballesteros; S. J. Pennycook; J. Santamaria

doi:10.1103/PhysRevB.66.134517

Direct Correlation between Tc and CuO2 Bilayer Spacing in YBa2Cu3O7-x

Superconductivity 2009-11-07 v1

Authors: M. Varela , D Arias , Z. Sefrioui , C. Leon , C. Ballesteros , S. J. Pennycook , J. Santamaria

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Abstract

We report the effects of epitaxial strain and deoxygenation on high quality [YBa2Cu3O7-x (YBCO)_N / PrBa2Cu3O7 (PBCO)_5] (1000 A thick) superlattices, with 1 <= N <= 12 unit cells. High spatial resolution electron energy loss spectroscopy (EELS) shows that strained, fully oxygenated YBCO layers are underdoped. Irrespective of whether underdoping is induced by strain or deoxygenation, X-ray diffraction analysis shows that Tc correlates directly with the separation of the CuO2 bilayers.

Keywords

high-temperature superconductivity

Cite

@article{arxiv.cond-mat/0208584,
  title  = {Direct Correlation between Tc and CuO2 Bilayer Spacing in YBa2Cu3O7-x},
  author = {M. Varela and D Arias and Z. Sefrioui and C. Leon and C. Ballesteros and S. J. Pennycook and J. Santamaria},
  journal= {arXiv preprint arXiv:cond-mat/0208584},
  year   = {2009}
}

Comments

13 pages + 4 figures accepted in Phys. Rev. B, scheduled 1 Oct 2002

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