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arXiv · 2001.01844

Characterization of Sr2RuO4 Josephson junctions made of epitaxial films

Masaki Uchida·Ikkei Sakuraba·Minoru Kawamura·Motoharu Ide·Kei S. Takahashi·Yoshinori Tokura·Masashi Kawasaki
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Abstract

We have studied fundamental properties of weak-link Sr2RuO4/Sr2RuO4 Josephson junctions fabricated by making a narrow constriction on superconducting Sr2RuO4 films through laser micro-patterning. The junctions show a typical overdamped behavior with much higher critical current density, compared with those previously reported for bulk Sr2RuO4/s-wave superconductor junctions. Observed magnetic field and temperature dependences of the Josephson critical current suggest that the chiral p-wave is unlikely for the superconducting symmetry, encouraging further theoretical calculations of the Sr2RuO4/Sr2RuO4 type junctions.

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Masaki Uchida, Ikkei Sakuraba, Minoru Kawamura, Motoharu Ide, Kei S. Takahashi, Yoshinori Tokura, Masashi Kawasaki. 2020-01-07. Characterization of Sr2RuO4 Josephson junctions made of epitaxial films. https://doi.org/10.1103/physrevb.101.035107

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