Year: 2013
Type: article
Abstract: The nature of the itinerant-localized transition of heavy electrons is clarified for the Kondo-Heisenberg lattice at finite temperatures. The phase diagram and electronic structure are derived by means of the continuous-time quantum Monte Carlo method combined with the dynamical mean-field theory. Around the itinerant-localized transition inside the antiferromagnetic phase, nearly flat bands appear on the Fermi surface with an almost vanishing quasiparticle 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, a coherent understanding is achieved on rich phase diagrams observed in ${\mathrm{CeRh}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{In}}_{5}$, ${\mathrm{CeRu}}_{2}({\mathrm{Si}}_{x}{\mathrm{Ge}}_{1\ensuremath{-}x}{)}_{2}$, ${\mathrm{UGe}}_{2}$, and $\mathrm{Ce}{T}_{2}{\mathrm{Al}}_{10}$ ($T=\mathrm{Fe}$, Ru, Os).
Source: Physical Review Letters
Authors: Shintaro Hoshino, Yoshio Kuramoto
Institution: Tohoku University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G8747749991
OpenAlex ID: W2015930541