Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4}
We investigate the connection between the local electron correlation and the momentum dependence of the spin susceptibility and the superconducting gap functions in Sr_{2}RuO_{4} using density-functional theory combined with dynamical mean-field theory. Adopting a frequency-dependent two-particle ve...
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| Format: | Article |
| Language: | English |
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American Physical Society
2023-06-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.L022058 |
| _version_ | 1797210452013350912 |
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| author | Chang-Youn Moon |
| author_facet | Chang-Youn Moon |
| author_sort | Chang-Youn Moon |
| collection | DOAJ |
| description | We investigate the connection between the local electron correlation and the momentum dependence of the spin susceptibility and the superconducting gap functions in Sr_{2}RuO_{4} using density-functional theory combined with dynamical mean-field theory. Adopting a frequency-dependent two-particle vertex moves the zero-energy spin susceptibility peaks towards the Brillouin zone center, compared with the random-phase approximation, which basically retains the peak positions closer to the Brillouin zone boundary as determined by the Fermi-surface nesting. We find that the d_{xy} orbital plays a central role here via its enhanced correlation strength. Solving the linearized Eliashberg equation from this spin susceptibility, the prime candidates for the superconducting gap are an s-wave and a nearly degenerate d-wave solutions, all in the spin singlet. Furthermore, another set of degenerate spin-singlet gap functions emerges, odd with respect to the k point as well as orbital exchanges. We show that the stability of these gap functions is strongly dependent on the peak position of the spin susceptibility in the Brillouin zone. |
| first_indexed | 2024-04-24T10:10:49Z |
| format | Article |
| id | doaj.art-871f8e5079974f5c815c36e4a45a9cad |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:10:49Z |
| publishDate | 2023-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-871f8e5079974f5c815c36e4a45a9cad2024-04-12T17:31:55ZengAmerican Physical SocietyPhysical Review Research2643-15642023-06-0152L02205810.1103/PhysRevResearch.5.L022058Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4}Chang-Youn MoonWe investigate the connection between the local electron correlation and the momentum dependence of the spin susceptibility and the superconducting gap functions in Sr_{2}RuO_{4} using density-functional theory combined with dynamical mean-field theory. Adopting a frequency-dependent two-particle vertex moves the zero-energy spin susceptibility peaks towards the Brillouin zone center, compared with the random-phase approximation, which basically retains the peak positions closer to the Brillouin zone boundary as determined by the Fermi-surface nesting. We find that the d_{xy} orbital plays a central role here via its enhanced correlation strength. Solving the linearized Eliashberg equation from this spin susceptibility, the prime candidates for the superconducting gap are an s-wave and a nearly degenerate d-wave solutions, all in the spin singlet. Furthermore, another set of degenerate spin-singlet gap functions emerges, odd with respect to the k point as well as orbital exchanges. We show that the stability of these gap functions is strongly dependent on the peak position of the spin susceptibility in the Brillouin zone.http://doi.org/10.1103/PhysRevResearch.5.L022058 |
| spellingShingle | Chang-Youn Moon Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4} Physical Review Research |
| title | Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4} |
| title_full | Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4} |
| title_fullStr | Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4} |
| title_full_unstemmed | Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4} |
| title_short | Effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in Sr_{2}RuO_{4} |
| title_sort | effects of orbital selective dynamical correlation on the spin susceptibility and superconducting symmetries in sr 2 ruo 4 |
| url | http://doi.org/10.1103/PhysRevResearch.5.L022058 |
| work_keys_str_mv | AT changyounmoon effectsoforbitalselectivedynamicalcorrelationonthespinsusceptibilityandsuperconductingsymmetriesinsr2ruo4 |