Coexistence of ferromagnetism and superconductivity: the role of kinetic interactions, kinetic correlations, and external pressure

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dc.creatorGórski, Grzegorz
dc.creatorKucab, Krzysztof
dc.creatorMizia, Jerzy
dc.date2008-06-17
dc.date.accessioned2026-07-07T12:29:23Z
dc.date.available2026-07-07T12:29:23Z
dc.descriptionWe use the Hubbard type model to describe the coexistence between superconductivity (SC) and ferromagnetism (F). Our Hamiltonian contains single-site and two-site interactions. All inter-site interactions will have included the inter-site kinetic correlation: $<c_{iσ}^{+}c_{jσ}>$, within the Hartree-Fock approximation. To obtain the SC transition temperature $T_{SC}$ and Curie temperature $T_{C}$ we use the Green's functions method. The numerical results show that the singlet SC is eliminated by F, but the triplet SC is either enhanced or depleted by F, depending on the carrier concentration and direction of a superconducting spin pair with respect to magnetization. The kinetic correlation is capable of creating superconductivity. We find that the ferromagnetism created by change of the bandwidth can coexist with singlet superconductivity. In the case of triplet superconductivity the ferromagnetism creates different critical SC temperatures for the $A_{1}$ and $A_{2}$ phase (the pair's spin parallel and antiparallel to magnetization, respectively).
dc.description15 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/0806.2774
dc.identifierhttp://arxiv.org/abs/0806.2774
dc.identifierPhysica C 469, 1-8 (2009)
dc.identifierdoi:10.1016/j.physc.2008.09.010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215859
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleCoexistence of ferromagnetism and superconductivity: the role of kinetic interactions, kinetic correlations, and external pressure
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