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Effects of epitaxial strain on the growth mechanism in YBa_(2)Cu_(3)O_(7-x) thin films in YBa_(2)Cu_(3)O_(7-x)/PrBa_(2)Cu_(3)O_(7) superlattices

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Varela del Arco, María and Grogger, W. and Arias Serna, Diego and Sefrioui, Zouhair and León Yebra, Carlos and Vázquez, L. and Ballesteros, C. and Krishnan, K.M. and Santamaría Sánchez-Barriga, Jacobo (2002) Effects of epitaxial strain on the growth mechanism in YBa_(2)Cu_(3)O_(7-x) thin films in YBa_(2)Cu_(3)O_(7-x)/PrBa_(2)Cu_(3)O_(7) superlattices. Physical review B, 66 (17). ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.66.174514


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http://journals.aps.org/Publisher


Abstract

We report on the growth mechanism of YBa_(2)Cu_(3)O_(7-x). Our study is based on an analysis of ultrathin YBa_(2)Cu_(3)O_(7-x) (YBCO) layers in c-axis-oriented YBa_(2)Cu_(3)O_(7-x)/PrBa_(2)Cu_(3)O_(7)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 blockby-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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Additional Information:

© 2002 The American Physical Society. We thank Professor Ivan Schuller for helpful conversations and interesting suggestions. This work was supported by Spanish CICYT MAT 2000 1468. Work at LBNL/NCEM was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098.

Uncontrolled Keywords:Critical currents; Resolution; Temperature; Layers; Images.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:31022
Deposited On:24 Jun 2015 07:16
Last Modified:10 Dec 2018 14:58

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