Reconciling the π phase shift in Josephson junction experiments with even-parity superconductivity in Sr2RuO4
Austin W. Lindquist, Hae-Young Kee
DOI 10.1103/PhysRevB.107.014506 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The superconducting state of Sr2RuO4 was once thought to be a leading candidate for p-wave superconductivity. A constant Knight shift below the transition temperature provided evidence for spin-triplet pairing, and a π phase shift observed in Josephson junction tunneling experiments suggested odd-parity pairing, both of which are described by p-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 Sr2RuO4.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Josephson current in s-wave-superconductor/Sr2RuO4 junctions
similarity 0.97Yasuhiro Asano et al.
Source status unknown — claims are unverified
Spin-polarized superconductivity: Order parameter topology, current dissipation, and multiple-period Josephson effect
similarity 0.97Eyal Cornfeld et al.
Source status unknown — claims are unverified
Microwave signatures of topological superconductivity in planar Josephson junctions
similarity 0.97Barış Pekerten et al.
Source status unknown — claims are unverified
Direct-current Josephson effect in SNS junctions of anisotropic superconductors
similarity 0.96Yasuhiro Asano
Source status unknown — claims are unverified
Quasiclassical Green’s function theory of the Josephson effect in chiral p-wave superconductor/diffusive normal metal/chiral p-wave superconductor junctions
similarity 0.96Y. Sawa et al.
Source status unknown — claims are unverified
Proposal for identifying possible even-parity superconducting states in Sr2RuO4 using planar tunneling spectroscopy
similarity 0.96Satoshi Ikegaya et al.
Source status unknown — claims are unverified