Coherently strained epitaxial YBa2Cu3O7-δ films grown on NdGaO3 (110)

Khanof, S.; Mannhart, J.; Boschker, H.

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Coherently strained epitaxial YBa₂Cu₃O_7-δ films grown on NdGaO₃ (110)

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Mannhart, J.
Department Solid State Quantum Electronics (Jochen Mannhart), Max Planck Institute for Solid State Research, Max Planck Society;

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Khanof, S., Mannhart, J., & Boschker, H. (2018). Coherently strained epitaxial YBa₂Cu₃O_7-δ films grown on NdGaO₃ (110). Applied Physics Letters, 113(2): 022605.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D89E-D

Abstract

YBa2Cu3O7-delta is a good candidate to systematically study high-temperature superconductivity by nanoengineering using advanced epitaxy. An essential prerequisite for these studies is coherently strained YBa2Cu3O7-delta thin films, which we present here using NdGaO3 (110) as a substrate. The films are coherent up to at least 100 nm thickness and have a critical temperature of 89 +/- 1 K. The a and b lattice parameters of YBa2Cu3O7-delta are matched to the in-plane lattice parameters of NdGaO3 (110), resulting in a large reduction of the orthorhombicity of YBa2Cu3O7-delta. These results imply that a large amount of structural disorder in the chain layers of YBa2Cu3O7-delta is not detrimental to superconductivity. Published by AIP Publishing.