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- W2078410239 abstract "In order to resolve the long-standing issue of how itinerant ferromagnetism is affected by lattice structure and Hund's coupling, we compare various three-dimensional lattice structures in the single- and multiorbital Hubbard models with the dynamical mean-field theory with an improved quantum Monte Carlo algorithm that preserves the spin-SU(2) symmetry. The result indicates that both the lattice structure and the $d$-orbital degeneracy are essential for the ferromagnetism in the parameter region representing a transition metal. Specifically, (a) Hund's coupling, despite the common belief, is important, which is here identified to come from particle-hole scatterings, and (b) the ferromagnetism is a correlation effect (outside the Stoner picture) as indicated from the band-filling dependence." @default.
- W2078410239 created "2016-06-24" @default.
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- W2078410239 date "2007-11-20" @default.
- W2078410239 modified "2023-10-01" @default.
- W2078410239 title "Itinerant Ferromagnetism in the Multiorbital Hubbard Model: A Dynamical Mean-Field Study" @default.
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- W2078410239 doi "https://doi.org/10.1103/physrevlett.99.216402" @default.
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