Reconciling phase shift in Josephson junction experiments with even-parity superconductivity in SrRuO
arXiv:2210.00554 · doi:10.1103/PhysRevB.107.014506
Abstract
The superconducting state of SrRuO was once thought to be a leading candidate for -wave superconductivity. A constant Knight shift below the transition temperature provided evidence for spin-triplet pairing, and a phase shift observed in Josephson junction tunneling experiments suggested odd-parity pairing, both of which are described by -wave states. However, with recent experiments observing a significant decrease in the Knight shift below the transition temperature, signifying a spin-singlet state, the odd-parity results are left to be reconciled. In this work, we show that an even-parity pseudospin-singlet state originating from interorbital pairing via spin-orbit coupling can explain what has been assumed to be evidence for an odd-parity state. In the presence of small mirror symmetry breaking, interorbital pairing is uniquely capable of displaying odd-parity characteristics required to explain these experimental results. Further, we discuss how these experiments may be used to differentiate the proposed pairing states of SrRuO.
arXiv comment9 pages, 4 figures, 1 table
References in corpus (40)
- Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
- High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
- Pronounced drop of O NMR Knight shift in superconducting state of SrRuO
- Chiral P-Wave Order in Sr_2RuO_4
- Observation of half-height magnetization steps in Sr2RuO4
- Split superconducting and time-reversal symmetry-breaking transitions, and magnetic order in SrRuO under uniaxial stress
- Reduction of the O Knight shift in the Superconducting State and the Heat-up Effect by NMR Pulses on SrRuO
- Thermodynamic Evidence for a Two-Component Superconducting Order Parameter in SrRuO
- Determination of the Superconducting Gap Structure in All Bands of the Spin-Triplet Superconductor Sr2RuO4
- Ultrasound evidence for a two-component superconducting order parameter in SrRuO
- Stabilizing Even-Parity Chiral Superconductivity in SrRuO
- A proposal for reconciling diverse experiments on the superconducting state in Sr2RuO4
- Josephson current in s-wave superconductor / Sr_2RuO_4 junctions
- Superconductivity from emerging magnetic moments
- Knight Shift and Leading Superconducting Instability From Spin Fluctuations in Sr2RuO4
- Momentum Resolved Superconducting Energy Gaps of SrRuO from Quasiparticle Interference Imaging
- Identifying detrimental effects for multi-orbital superconductivity - Application to SrRuO
- Vertical line nodes in the superconducting gap structure of Sr2RuO4
- Evidence for even parity unconventional superconductivity in SrRuO
- Phase-sensitive tests of the pairing state symmetry in Sr2RuO4
- Electronic orders in multi-orbital Hubbard models with lifted orbital degeneracy
- Superconducting order parameter of SrRuO: a microscopic perspective
- Superconducting Symmetries of SrRuO from First-Principles Electronic Structure
- Identifying spin-triplet pairing in spin-orbit coupled multi-band superconductors
- Superconducting state of SrRuO in the presence of longer-range Coulomb interactions
- Dislocations and the enhancement of superconductivity in odd-parity superconductor SrRuO
- Group-theoretic classification of superconducting states of Strontium Ruthenate
- Shadowed triplet pairings in Hund's metals with spin-orbit coupling
- Exotic Cooper pairing in multi-orbital models of SrRuO
- Higher angular momentum pairings in interorbital shadowed-triplet superconductors: Application to SrRuO
- Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling: Coexistence of Even- and Odd-Frequency Pairing and the Case of Strontium Ruthenate
- Hund's coupling stabilized superconductivity in the presence of spin-orbit interactions
- Distinct reduction of Knight shift in superconducting state of SrRuO under uniaxial strain
- Leading superconducting instabilities in three-dimensional models for Sr2RuO4
- Strain-induced time reversal breaking and half quantum vortices near a putative superconducting tetra-critical point in SrRuO
- Josephson effect in a multi-orbital model for SrRuO
- Josephson Effect and Triplet--Singlet Ratio of Non--centrosymmetric Superconductors
- Higher angular momentum pairing states in SrRuO in the presence of longer-range interactions
- Josephson Effect between Conventional and Rashba Superconductors
- Evolution of Interorbital Superconductor to Intraorbital Spin-Density Wave in Layered Ruthenates