Superconducting transition of Ru in SQUIDs with Nb/Ru/Sr2RuO4 junctions

Y. Nago, R. Ishiguro, T. Sakurai, M. Yakabe, T. Nakamura, S. Yonezawa, S. Kashiwaya, H. Takayanagi, Y. Maeno

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Abstract

We have measured transport properties and magnetic responses of direct current superconducting quantum interference devices(dc-SQUIDs) with Nb/Ru/Sr2RuO4 junctions on The same Ru inclusion of a Sr2RuO4-Ru eutectic crystal. We observed a superconducting transition of The Ru at 0.50 K and another transition with anomalous interference patterns of The SQUID at 0.40 K. The second transition led to change of The SQUID structure due to energy competition of alternative supercurrent paths. Phase shifts of The peak of The Fraunhofer diffraction pattern were observed below The transition temperatures, implying topological effects due to a chiral p-wave state or its competition with a s-wave state.

Original languageEnglish
Article number022031
JournalJournal of Physics: Conference Series
Volume568
DOIs
Publication statusPublished - 2014 Jan 1
Event27th International Conference on Low Temperature Physics, LT 2014 - Buenos Aires, Argentina
Duration: 2014 Aug 62014 Aug 13

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nago, Y., Ishiguro, R., Sakurai, T., Yakabe, M., Nakamura, T., Yonezawa, S., Kashiwaya, S., Takayanagi, H., & Maeno, Y. (2014). Superconducting transition of Ru in SQUIDs with Nb/Ru/Sr2RuO4 junctions. Journal of Physics: Conference Series, 568, [022031]. https://doi.org/10.1088/1742-6596/568/2/022031