Spectroscopy of SrRuO/Ru Junctions in Eutectic

H. Yaguchi , K. Takizawa , M. Kawamura , N. Kikugawa , Y. Maeno , T. Meno , T. Akazaki , K. Semba

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H. Takayanagi

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords eutecticphasesr2ruo4junctionssystemzbcpbiasboundary

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We have investigated the tunnelling properties of the interface between superconducting Sr2RuO4 and a single Ru inclusion in eutectic. By using a micro-fabrication technique, we have made Sr2RuO4/Ru junctions on the eutectic system that consists of Sr2RuO4 and Ru micro-inclusions. Such a eutectic system exhibits surface superconductivity, called the 3-K phase. A zero bias conductance peak (ZBCP) was observed in the 3-K phase. We propose to use the onset of the ZBCP to delineate the phase boundary of a time-reversal symmetry breaking state.

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Spectroscopy of SrRuO/Ru Junctions in Eutectic

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