Frequency-dependent Inter-pseudospin Solutions to Superconducting Strontium Ruthenate

Gingras, Olivier; Allaglo, Nikita; Nourafkan, Reza; Côté, Michel; Tremblay, A.-M. S.

doi:10.48550/arxiv.2201.08917

Cited by 1 publication

(3 citation statements)

References 76 publications

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“…As discussed in Ref. [7], this property implies that the effect of such states on the Fermi surface of SRO could be negligible enough that it has a negligible signature in specific heat. As proposed, combining it with the B + 1g through an accidental degeneracy is an important candidate for SRO since as it could potentially explain the absence of a two temperatures transition in specific heat under uniaxial strain, while explaining the two temperature signature in µSR.…”

Section: Time-reversal Symmetrymentioning

confidence: 81%

“…As discussed in Ref. [7], this symmetry is a prime candidate that could form an accidental degeneracy in SRO. It is usually discussed as having a purely − S + P + O + T character.…”

Section: Time-reversal Symmetrymentioning

confidence: 88%

“…These difficulties are embodied by the still ongoing debate about the symmetry of the SCOP of strontium ruthenate, Sr 2 RuO 4 (SRO). This material is considered an archetype of unconventional superconductivity, yet theoretical solutions do not seem to explain all experimental observables [6,7]. One of the key properties of SRO is time-reversal (TR) symmetry breaking observed by both muon spin relaxation (µSR) [8,9] and polar Kerr effect [10].…”

Section: Introductionmentioning

confidence: 99%

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Coexistence of Even- and Odd-Frequency Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling

Gingras,

Allaglo,

Nourafkan

et al. 2022

Preprint

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The symmetry of the superconducting order parameters in multi-orbital systems involves many quantum numbers. Pairing mediated by electronic correlations being retarded, the frequency structure of superconducting order parameters bears important information. Here we generalize the frequency-dependent theory of superconductivity mediated by spin and charge fluctuations to systems with spin-orbit coupling. This formulation is applied to strontium ruthenate with a normal state obtained using density functional theory. Taking advantage of pseudospin and inversion symmetries, the inter-pseudospin sector of the normal state Eliashberg equation is mapped to a pseudospin-diagonal one. We find ubiquitous entanglement of spin and orbital quantum numbers, along with notable mixing between even-and odd-frequency correlations. We present the phase diagrams for leading and subleading symmetries in the pseudospin-orbital basis of Sr2RuO4. They are characterized using SP OT contributions, group theory, phase distributions in the complex plane and temperature dependence.

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Section: Time-reversal Symmetrymentioning

confidence: 81%

“…As discussed in Ref. [7], this symmetry is a prime candidate that could form an accidental degeneracy in SRO. It is usually discussed as having a purely − S + P + O + T character.…”

Section: Time-reversal Symmetrymentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coexistence of Even- and Odd-Frequency Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling

Gingras,

Allaglo,

Nourafkan

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Frequency-dependent Inter-pseudospin Solutions to Superconducting Strontium Ruthenate

Cited by 1 publication

References 76 publications

Coexistence of Even- and Odd-Frequency Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling

Coexistence of Even- and Odd-Frequency Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling

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