2016年8月
Evolution of supercurrent path in Nb/Ru/Sr2RuO4 dc-SQUIDs
PHYSICAL REVIEW B
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- 巻
- 94
- 号
- 5
- 開始ページ
- 054501-1-8
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.94.054501
- 出版者・発行元
- AMER PHYSICAL SOC
Phase-sensitive measurements of direct-current superconducting quantum interference devices (dc-SQUIDs) composed of Sr2RuO4-Ru eutectic crystals have been performed to temperatures below a bulk Ru superconducting transition temperature at 0.49 K. A SQUID with Nb/Ru/Sr2RuO4 junctions fabricated on one Ru inclusion exhibits two distinct transitions due to the Ru superconducting transition and competition of proximity-induced superconducting gaps at the junctions. At sufficiently low temperatures, the SQUID interference patterns start to collapse with large phase shifts of the Fraunhofer patterns. This result indicates the influence of magnetic fluxes induced by large bias currents flowing in a strongly asymmetric supercurrent path. Such a large change in supercurrent path suggests superconducting phase mismatch between the s-wave and chiral p-wave states at the Ru/Sr2RuO4 interface.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.94.054501
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000380948600008