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DOI

We study the influence of Coulomb correlations on spectral and magnetic properties of fcc cobalt using a combination of density functional theory and dynamical mean-field theory. The computed uniform and local magnetic susceptibilities obey the Curie–Weiss law, which, as we demonstrate, occurs due to the partial formation of local magnetic moments. We find that the lifetime of these moments in cobalt is significantly less than in bcc iron, suggesting a more itinerant magnetism in cobalt. In contrast to the bcc iron, the obtained electron self-energies exhibit a quasiparticle shape with the quasiparticle mass enhancement factor m*/m ~ 1.8, corresponding to moderately correlated metal. Finally, our calculations reveal that the static magnetic susceptibility of cobalt is dominated by ferromagnetic correlations, as evidenced by its momentum dependence. © 2023, The Author(s).
Язык оригиналаАнглийский
Страницы (с-по)854-858
Число страниц5
ЖурналJETP Letters
Том117
Номер выпуска11
DOI
СостояниеОпубликовано - 2023

    Предметные области ASJC Scopus

  • Physics and Astronomy (miscellaneous)

    Предметные области WoS

  • Физика, Многопрофильные области

ID: 43270377