Journal article

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
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301650
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