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

Effects of epitaxial strain on the growth mechanism in YBa₂Cu₃O_7-x thin films in YBa₂Cu₃O_7-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

Institute of Electron Microscopy and Nanoanalysis (5190)

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the growth mechanism of YBa₂Cu₃O_7-x. Our study is based on an analysis of ultrathin YBa₂Cu₃O_7-x (YBCO) layers in c-axis-oriented YBa₂Cu₃O_7-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 language	English
Article number	174514
Pages (from-to)	1745141-1745146
Number of pages	6
Journal	Physical Review B
Volume	66
Issue number	17
Publication status	Published - 1 Nov 2002

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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

abstract = "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.",

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T1 - Effects of epitaxial strain on the growth mechanism in YBa2Cu3O7-x thin films in YBa2Cu3O7-x/PrBa2 Cu3O7 superlattices

AU - Varela, M.

AU - Grogger, W.

AU - Arias, D.

AU - Sefrioui, Z.

AU - León, C.

AU - Vazquez, L.

AU - Ballesteros, C.

AU - Krishnan, K. M.

AU - Santamaría, J.

PY - 2002/11/1

Y1 - 2002/11/1

N2 - 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.

AB - 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.

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Effects of epitaxial strain on the growth mechanism in YBa₂Cu₃O_7-x thin films in YBa₂Cu₃O_7-x/PrBa₂ Cu₃O₇ superlattices

Abstract

ASJC Scopus subject areas

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