Phase-sensitive tests of the pairing state symmetry in Sr2RuO4

Abstract

Exotic superconducting properties of Sr${}_2$RuO${}_4$ have provided strong support for an unconventional pairing symmetry. However, the extensive efforts over the past decade have not yet unambiguously resolved the controversy about the pairing symmetry in this material. While recent phase-sensitive experiments using flux modulation in Josephson junctions consisting of Sr${}_2$RuO${}_4$ and a conventional superconductor have been interpreted as conclusive evidence for a chiral spin-triplet pairing, we propose here an alternative interpretation. We show that an overlooked chiral spin-singlet pairing is also compatible with the observed phase shifts in Josephson junctions and propose further experiments which would distinguish it from its spin-triplet counterpart.

4 pages, 1 figure

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Cited by in corpus (57)

• Semiconductor Spintronics
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• Thermodynamic Evidence for a Two-Component Superconducting Order Parameter in Sr${}_2$RuO${}_4$
• Stabilizing Even-Parity Chiral Superconductivity in Sr${}_2$RuO${}_4$
• A proposal for reconciling diverse experiments on the superconducting state in Sr2RuO4
• Testable signatures of quantum non-locality in a two-dimensional chiral p-wave superconductor
• Momentum Resolved Superconducting Energy Gaps of Sr${}_2$RuO${}_4$ from Quasiparticle Interference Imaging
• Cubic spin-orbit coupling and anomalous Josephson effect in planar junctions
• Vertical line nodes in the superconducting gap structure of Sr2RuO4
• Evidence from Tunneling Spectroscopy for a Quasi-One Dimensional Origin of Superconductivity in Sr2RuO4
• Wireless Majorana Bound States: From Magnetic Tunability to Braiding
• High sensitivity heat capacity measurements on Sr2RuO4 under uniaxial pressure
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• Gauge-invariant electromagnetic response of a chiral px+ipy superconductor
• Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
• Unsplit superconducting and time reversal symmetry breaking transitions in Sr${}_2$RuO${}_4$ under hydrostatic pressure and disorder
• Inhomogeneous time-reversal symmetry breaking in ${\mathrm{Sr}}_2\mathrm{Ru}{\mathrm{O}}_4$
• Quantum transport in noncentrosymmetric superconductors and thermodynamics of ferromagnetic superconductors
• First-principles calculations of spin-orbit effects and NMR in Sr2RuO4
• Superconducting order of ${\mathrm{Sr}}_2{\mathrm{RuO}}_4$ from a three-dimensional microscopic model
• Phase Control of Majorana Bound States in a Topological X Junction
• Tunable Magnetic Textures: From Majorana Bound States to Braiding
• Anisotropy of the Superconducting State in Sr2RuO4
• Shadowed triplet pairings in Hund's metals with spin-orbit coupling
• Spin-sensitive Long-ranged Proximity Effect for Triplet Superconductors
• Theory of the high-frequency chiral optical response in a p_x+ip_y superconductor
• Enhanced spin-triplet pairing in magnetic junctions with s-wave superconductors
• Heat capacity double transitions in time-reversal symmetry broken superconductors
• Charge and spin supercurrents in triplet superconductor--ferromagnet--singlet superconductor Josephson junctions
• Theory of the tunneling spectroscopy of ferromagnetic superconductors
• Stability of half quantum vortex in rotating superfluid 3He-A between parallel plates
• Anisotropy of magnetic interactions and symmetry of the order parameter in unconventional superconductor Sr${}_2$RuO${}_4$
• Conductance spectra of ferromagnetic superconductors: Quantum transport in a ferromagnetic metal/non-unitary ferromagnetic superconductor junction
• Leading superconducting instabilities in three-dimensional models for Sr2RuO4
• Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance
• Magnetic field induced rotation of the d-vector in the spin triplet superconductor Sr${}_2$RuO${}_4$
• Spin gap and L modulated intensity at the low-energy incommensurate magnetic fluctuations in the superconducting state of Sr2RuO4
• Constraints on the superconducting state of Sr${}_2$RuO${}_4$ from elastocaloric measurements
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• Superconducting proximity effects in metals with a repulsive pairing interaction
• Probing Majorana-like states in quantum dots and quantum rings
• Nontrivial interplay between superconductivity and spin-orbit coupling in non-centrosymmetric ferromagnets
• Theory of Josephson effect in chiral p-wave superconductor / diffusive normal metal / chiral p-wave superconductor junctions
• Multiband mean-field theory of the $d+ig$ superconductivity scenario in Sr${}_2$RuO${}_4$
• Identifying possible pairing states in Sr${}_2$RuO${}_4$ by tunneling spectroscopy
• Singular and Half-Quantum Vortices and Associated Majorana Particles in Superfluid 3He-A between Parallel Plates
• Suppressed fluctuations as the origin of the static magnetic order in strained Sr${}_2$RuO${}_4$
• Paramagnetic Intrinsic Meissner Effect in Layered Superconductors
• Impurity induced double transitions for accidentally degenerate unconventional pairing states
• Microwave Signatures of Topological Superconductivity in Planar Josephson Junctions
• Modern Theory for the Orbital Moment in a Superconductor
• Reconciling $\pi$ phase shift in Josephson junction experiments with even-parity superconductivity in Sr${}_2$RuO${}_4$
• Signatures of enhanced spin-triplet superconductivity induced by interfacial properties
• Even odder after twenty-three years: the superconducting order parameter puzzle of Sr2RuO4
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