Reentrant S-wave Superconductivity in the Periodic Anderson Model with Attractive Conduction Band Hubbard Interaction

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dc.citation.issue32
dc.citation.rankM22
dc.citation.spage325601
dc.citation.volume32
dc.contributor.authorvan Gerven Oei, Willem-Victor Mattheus
dc.contributor.authorTanasković, Darko
dc.date.accessioned2024-06-18T07:48:04Z
dc.date.available2024-06-18T07:48:04Z
dc.date.issued2020-05-12
dc.description.abstractSpin-flip scattering from magnetic impurities has a strong pair-breaking effect in s-wave superconductors where increasing the concentration of impurities rapidly destroys superconductivity. For small Kondo temperature T K the destruction of superconductivity is preceded by the reentrant superconductivity at finite temperature range T c2 < T < T c1, while the normal phase reappears at T < T c2 ∼ T K. Here we explore the superconducting phase in a periodic system modeled as the Anderson lattice with additional attractive on-site (Hubbard) interaction g acting on the conduction band electrons. We solve the equations using dynamical mean field theory which incorporates Kondo physics, while the pairing interaction is treated on the static mean-field level. For large coupling g we find reentrant superconductivity which resembles the case with diluted impurities. However, we find evidence that reentrant superconductivity is here not a consequence of many-body correlations leading to the Kondo effect, but it rather stems from a competition between the single-particle hybridization and superconducting pairing. An insight into the spectral functions with in-gap structures is obtained from an approximate noninteracting dual model whose solution interpolates between several exact limits.
dc.identifier.doi10.1088/1361-648x/ab83b0
dc.identifier.issn0953-8984
dc.identifier.issn1361-648X
dc.identifier.scopus2-s2.0-85088523370
dc.identifier.urihttps://pub.ipb.ac.rs/handle/123456789/112
dc.identifier.wos000536074400001
dc.language.isoen
dc.publisherInstitute of Physics Publishing
dc.relation.ispartofJournal of Physics: Condensed Matter
dc.relation.ispartofabbrJ. Phys. Condens. Matter
dc.rightsopenAccess
dc.titleReentrant S-wave Superconductivity in the Periodic Anderson Model with Attractive Conduction Band Hubbard Interaction
dc.typeArticle
dc.type.versionpublishedVersion
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