Impurity induced double transitions for accidentally degenerate unconventional pairing states

Abstract

Non-magnetic impurities can lift the accidental degeneracy of unconventional pairing states, such as the $(d+ig)$-wave state recently proposed for Sr${}_2$RuO${}_4$. This type of effect would lead to a superconducting double transition upon impurity doping. In a model calculation it is shown how this behavior depends on material parameters and how it could be detected.

arXiv comment5 pages, 3 figures

References in corpus (17)

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Cited by in corpus (7)

• Unsplit superconducting and time reversal symmetry breaking transitions in Sr${}_2$RuO${}_4$ under hydrostatic pressure and disorder
• Heat capacity double transitions in time-reversal symmetry broken superconductors
• Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling: Coexistence of Even- and Odd-Frequency Pairing and the Case of Strontium Ruthenate
• Neutron scattering studies on spin fluctuations in Sr${}_2$RuO${}_4$
• A microscopic Ginzburg--Landau theory and singlet ordering in Sr${}_2$RuO${}_4$
• Multipole-fluctuation pairing mechanism of $d_{x^2-y^2}+ig$ superconductivity in Sr${}_2$RuO${}_4$
• Pair-Kondo effect: a mechanism for time-reversal broken superconductivity in UTe${}_2$