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Itinerant vs Localized Heavy-Electron Magnetism | | Shintaro Hoshino
; Yoshio Kuramoto
; | | Date: |
16 Apr 2013 | | Abstract: | It is demonstrated that itinerant-localized transition of heavy electrons
occurs inside the magnetically ordered phase of the Kondo-Heisenberg lattice.
The phase diagram and electronic structure are derived by means of the
continuous-time quantum Monte Carlo combined with the dynamical mean-field
theory. Around the itinerant-localized transition, nearly flat bands appear on
the Fermi surface with almost vanishing quasi-particle renormalization factor.
At the same time, there emerges a strong local magnetic fluctuation with a
minute energy scale. Considering both antiferromagnetic and ferromagnetic
Heisenberg interactions, coherent understanding is achieved on rich phase
diagrams observed in CeRh$_{1-x}$Co$_x$In$_5$, CeRu$_2$(Si$_x$Ge$_{1-x}$)$_2$,
UGe$_2$ and CeT$_2$Al$_{10}$ (T=Fe,Ru,Os). | | Source: | arXiv, 1304.4325 | | Services: | Forum | Review | PDF | Favorites | |
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