Pair suppression caused by mosaic-twist defects in superconducting Sr2RuO4 thin-films prepared using pulsed laser deposition

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2020
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Garcia, Carla Maria Palomares
Kimbell, Graham
Vickers, Mary E.
Massabuau, Fabien C-P.
Komori, Sachio
Divitini, Giorgio
Yasui, Yuuki
Lee, Han Gyeol
Kim, Jinkwon
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https://doi.org/10.1038/s43246-020-0026-1
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Communications Materials. Springer Nature. 2020, 2020(1), 23. eISSN 2662-4443. Available under: doi: 10.1038/s43246-020-0026-1
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Sr2RuO4 (SRO214) is a prototypical unconventional superconductor. However, since the discovery of its superconductivity a quarter of a century ago, the symmetry of the bulk and surface superconducting states in single crystal SRO214 remains controversial. Solving this problem is massively impeded by the fact that superconducting SRO214 is extremely challenging to achieve in thin-films as structural defects and impurities sensitively annihilate superconductivity. Here we report a protocol for the reliable growth of superconducting SRO214 thin-films by pulsed laser deposition and identify universal materials properties that are destructive to the superconducting state. We demonstrate that careful control of the starting material is essential in order to achieve superconductivity and use a single crystal target of Sr3Ru2O7 (SRO327). By systematically varying the SRO214 film thickness, we identify mosaic twist as the key in-plane defect that suppresses superconductivity. The results are central to the development of unconventional superconductivity.

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ISO 690GARCIA, Carla Maria Palomares, Angelo DI BERNARDO, Graham KIMBELL, Mary E. VICKERS, Fabien C-P. MASSABUAU, Sachio KOMORI, Giorgio DIVITINI, Yuuki YASUI, Han Gyeol LEE, Jinkwon KIM, 2020. Pair suppression caused by mosaic-twist defects in superconducting Sr2RuO4 thin-films prepared using pulsed laser deposition. In: Communications Materials. Springer Nature. 2020, 2020(1), 23. eISSN 2662-4443. Available under: doi: 10.1038/s43246-020-0026-1
BibTex
@article{Garcia2020-12suppr-50004,
  year={2020},
  doi={10.1038/s43246-020-0026-1},
  title={Pair suppression caused by mosaic-twist defects in superconducting Sr<sub>2</sub>RuO<sub>4</sub> thin-films prepared using pulsed laser deposition},
  number={1},
  volume={2020},
  journal={Communications Materials},
  author={Garcia, Carla Maria Palomares and Di Bernardo, Angelo and Kimbell, Graham and Vickers, Mary E. and Massabuau, Fabien C-P. and Komori, Sachio and Divitini, Giorgio and Yasui, Yuuki and Lee, Han Gyeol and Kim, Jinkwon},
  note={Article Number: 23}
}
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