Anomalous Enhancement of Upper Critical Field in Sr2RuO4 Thin Films

Abstract

We report large enhancement of upper critical field Hc2 observed in superconducting Sr2RuO4 thin films. Through dimensional crossover approaching two dimensions, Hc2 except the in-plane field direction is dramatically enhanced compared to bulks, following a definite relation distinct from bulk one between Hc2 and the transition temperature. The anomalous enhancement of Hc2 is highly suggestive of important changes of the superconducting properties, possibly accompanied with rotation of the triplet d-vector. Our findings will become a crucial step to further explore exotic properties by employing Sr2RuO4 thin films.

15 pages, 4 figures

References in corpus (3)

• First-Order Superconducting Transition of Sr2RuO4
• Anomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with a Rashba-type Heavy Fermion Interface
• Molecular beam epitaxy growth of superconducting Sr2RuO4 films

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• Unconventional two-dimensional quantum oscillations in three-dimensional thick SrRuO${}_3$ films
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• Superconducting properties of van der Waals metal-rich subsulfide Nb${}_{1.7}$Ta${}_{3.3}$S${}_2$