Phase Transition in the 3-Kelvin Phase of Eutectic Sr₂RuO₄–Ru
- Kaneyasu, Hirono Department of Material Science, University of Hyogo, Japan - CREST(JST), Kawaguchi, Saitama, Japan
- Hayashi, Nobuhiko Nanoscience and Nanotechnology Research Center (N2RC), Osaka Prefecture University, Sakai, Japan - CREST(JST), Kawaguchi, Saitama, Japan
- Gut, Bruno Department of Physics, University of Fribourg, Switzerland
- Makoshi, Kenji Department of Material Science, University of Hyogo, Japan - CREST(JST), Kawaguchi, Saitama, Japan
- Sigrist, Manfred Theoretische Physik, ETH-Zürich, Switzerland
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27.09.2010
Published in:
- Journal of the Physical Society of Japan. - 2010, vol. 79, p. 104705
English
The inhomogeneous 3-Kelvin (3K) phase of the eutectic Sr₂RuO₄ with Ru inclusions nucleates superconductivity at the interface between Ru and Sr₂RuO₄. The structure of the interface state and its physical properties are examined here. Two superconducting phases are identified between the transitions to the bulk phase at 1.5 K and to the 3K phase. The nucleation of the 3K phase results in a state conserving time reversal symmetry, which generates an intrinsically frustrated superconducting network in samples with many Ru inclusions. At a lower temperature (>1.5 K), a discontinuous (first order) transition to an interface state breaking time reversal symmetry is found leading to an unfrustrated network phase. It is shown that this phase transition located at a temperature between 1.5 and 3 K would yield the anomalous property showing that the critical current in such a network depends on the sign of the current, reproducing recent experimental observations.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 21120
- DOI 10.1143/JPSJ.79.104705
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301650
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