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

Palomares Garcia, Carla Maria 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 Gyeol Lee, Han and Kim, Jinkwon and Kim, Bongju and Blamire, Mark G. and Vecchione, Antonio and Fittipaldi, Rosalba and Maeno, Yoshiteru and Won Noh, Tae and Robinson, Jason W. A. (2020) Pair suppression caused by mosaic-twist defects in superconducting Sr2RuO4 thin-films prepared using pulsed laser deposition. Communications Materials, 1. 23. ISSN 2662-4443

[img]
Preview
Text (Palomares-Garcia-etal-CM-2020-Pair-suppression-caused-by-mosaic-twist defects-in-superconducting-Sr2RuO4)
Palomares_Garcia_etal_CM_2020_Pair_suppression_caused_by_mosaic_twist_defects_in_superconducting_Sr2RuO4.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo

Download (4MB)| Preview

    Abstract

    Sr2RuO4 is a prototypical unconventional superconductor, but the superconducting symmetries of the bulk and surface states in single crystals remains controversial. Solving this problem is impeded by the challenge of producing thin-films of Sr2RuO4 free of defects and impurities which annihilate the superconductivity. Here, we report the reliable growth of superconducting Sr2RuO4 thin-films by pulsed laser deposition and identify the universal material properties that are destructive to the superconducting state. We demonstrate that careful control of the starting material is essential to achieve superconductivity as well as the use of a single crystal target of Sr3Ru2O7. By systematically varying the Sr2RuO4 film thickness, we identify mosaic twist as the key in-plane defect that suppresses superconductivity. These results are central to the development of our understanding of unconventional superconductivity.