2010/04/30 by Hirono Kaneyasu, Nobuhiko Hayashi, Bruno Gut +2 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Eutectic system #Nucleation #Phase (matter) #Phase transition #Physics of Superconductivity and Magnetism #Superconductivity #Symmetry (geometry) #Topological Materials and Phenomena #Yield (engineering) #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.79.104705
published as J. Phys. Soc. Jpn. 79 (2010) No.10 · This paper has been withdrawn by the authors. 5 pages, 6 figures
arxiv created 2010/08/09 · openalex publication_date 2010/09/27 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 1.5K 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 (>1.5K), 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 3K would yield the anomalous property that the critical current in such a network depends on the sign of the current, reproducing recent experimental observations.