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Characterization of Sr2RuO4 Josephson junctions made of epitaxial films

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arxiv 2001.01844 v1 pith:ASFWET6Z submitted 2020-01-07 cond-mat.supr-con cond-mat.mtrl-scicond-mat.str-el

Masaki Uchida , Ikkei Sakuraba , Minoru Kawamura , Motoharu Ide , Kei S. Takahashi , Yoshinori Tokura , Masashi Kawasaki This is my paper · ORCID
classification cond-mat.supr-concond-mat.mtrl-scicond-mat.str-el
keywords sr2ruo4junctionsjosephsoncriticalcurrentfilmssuperconductingbehavior
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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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