Effects of epitaxial strain on the growth mechanism in YBa2Cu3O7-x thin films in YBa2Cu3O7-x/PrBa2 Cu3O7 superlattices

M. Varela, W. Grogger, D. Arias*, Z. Sefrioui, C. León, L. Vazquez, C. Ballesteros, K. M. Krishnan, J. Santamaría

*Corresponding author for this work

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We report on the growth mechanism of YBa2Cu3O7-x. Our study is based on an analysis of ultrathin YBa2Cu3O7-x (YBCO) layers in c-axis-oriented YBa2Cu3O7-x/PrBa 2Cu3O7 superlattices. We have found that the release of epitaxial strain in very thin YBCO layers triggers a change in the dimensionality of the growth mode. Ultrathin epitaxially strained YBCO layers with thickness below 3 unit cells grow in a block-by-block two-dimensional mode that is coherent over large lateral distances. Meanwhile, when the thickness increases and the strain relaxes, layer growth turns three-dimensional, resulting in rougher layers and interfaces.

Original languageEnglish
Article number174514
Pages (from-to)1745141-1745146
Number of pages6
JournalPhysical Review B
Issue number17
Publication statusPublished - 1 Nov 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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