Topological competition of superconductivity in Pb/Ru/Sr_2RuO_4 junctions

Abstract

We devise a new proximity junction configuration where an s-wave superconductivity and the superconductivity of Sr2RuO4 interfere with each other. We reproducibly observe in such a Pb/Ru/Sr2RuO4 junction with a single Pb electrode that the critical current Ic drops sharply just below the bulk Tc of Sr2RuO4 and furthermore increases again below a certain temperature below Tc. In order to explain this extraordinary temperature dependence of Ic, we propose a competition effect involving topologically distinct superconducting phases around Ru inclusions. Thus, such a device may be called a "topological superconducting junction".

4 pages, 5 figures, to be published as a Rapid Communication in Physical Review B

References in corpus (5)

• Anomalous Transport through the p-Wave Superconducting Channel in the 3-K Phase of Sr2RuO4
• Influence of the domain walls on the Josephson effect in Sr${}_2$RuO${}_4$
• Phase transition in the 3 Kelvin phase in the eutectic Sr2RuO4-Ru
• Nucleation of Vortex State in Ru-inclusion in Eutectic Ruthenium Oxide Sr2RuO4-Ru
• Spatial development of superconductivity in the Sr2RuO4-Ru eutectic system

Cited by in corpus (16)

• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Strong Peak in $T_c$ of Sr${}_2$RuO${}_4$ Under Uniaxial Pressure
• First-Order Superconducting Transition of Sr2RuO4
• Anomalous switching in Nb/Ru/Sr2RuO4 topological junctions by chiral domain wall motion
• Specific-heat evidence of the first-order superconducting transition in Sr2RuO4
• Multi-component order parameter superconductivity of Sr${}_2$RuO${}_4$ revealed by topological junctions
• Upper critical field of the noncentrosymmetric superconductor BiPd
• Spontaneous superconducting diode effect in non-magnetic Nb/Ru/Sr${}_2$RuO${}_4$ topological junctions
• Inversion symmetry of Josephson current as test of chiral domain wall motion in Sr${}_2$RuO${}_4$
• Ferromagnetic SrRuO3 thin-film deposition on a spin-triplet superconductor Sr2RuO4 with highly conducting interface
• Limiting mechanism for critical current in topologically frustrated Josephson junctions
• Probing chiral superconductivity in Sr${}_2$RuO${}_4$ underneath the surface by point contact measurements
• Evolution of the filamentary 3-Kelvin phase in Pb-Ru-Sr2RuO4 Josephson junctions
• Anomalous Hall effect in semiconductor quantum wells in proximity to chiral p-wave superconductors
• A Review of Electronic Transport in Superconducting Sr${}_2$RuO${}_4$ Junctions
• Anomalous anisotropic behaviour of spin-triplet proximity effect in Au/SrRuO${}_3$/Sr${}_2$RuO${}_4$ junctions