Degeneracy between even- and odd-parity superconductivity in the quasi-1D Hubbard model and implications for Sr2RuO4

2020/07/27 by Thomas Scaffidi, Scaffidi, Thomas · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.2007.13769

openalex publication_date 2020/07/27 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28

Abstract

Based on a weak coupling calculation, we show that an accidental degeneracy appears between even- and odd-parity superconductivity in the quasi-1D limit of the repulsive Hubbard model on the square lattice. We propose that this effect could be at play on the quasi-1D orbitals Ru d_zx and d_zy of Sr2RuO4, leading to a gap of the form Δ_even + i Δ_odd which could help reconcile several experimental results.

Cited by

• Superconducting state of Sr2RuO4 in the presence of longer-range Coulomb interactions

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