2015/10/20 by Hirono Kaneyasu, Sarah B. Etter, Tôru Sakai +2
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Combinatorics #Condensed matter physics #Crystallography #Magnetic and transport properties of perovskites and related materials #Materials science #Phase (matter) #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Topology (electrical circuits) #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.92.134515
published as Phys. Rev. B 92 (2015) 134515 · 5 pages, 4 figures
openalex publication_date 2015/10/20 · openalex created_date 2017/01/06 · arxiv created 2017/08/23 · arxiv updated 2017/08/25 · openalex updated_date 2026/08/05
The evolution of the filamentary 3-Kelvin (3-K) superconducting phase at the interface between Sr2RuO4 and Ru-metal inclusions is discussed for Pb-Ru-Sr2RuO4 contacts. Using the Ginzburg-Landau model, the influence of proximity-induced superconductivity in Ru on the topology of the 3-K phase is analyzed. Because the s-wave order parameter in Ru favors a 3-K state of trivial topology, the onset temperature of the phase with a nontrivial topology, which is compatible with the bulk phase of Sr2RuO4, is essentially reduced to the bulk transition temperature. Because the topology of the superconducting state in Sr2RuO4 is crucial for the Josephson effect through Pb-Ru-Sr2RuO4 contacts, this model qualitatively reproduces the experimental observation of the anomalous temperature dependence on the critical current.