2020
DOI: 10.1103/physrevresearch.2.033028
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Optical and magnetic excitations in the underscreened quasiquartet Kondo lattice

Abstract: The underscreened Kondo lattice consisting of a single twofold degenerate conduction band and a crystalline electric-field (CEF) split 4 f-electron quasiquartet has nonconventional quasiparticle dispersions obtained from the constrained mean-field theory. An additional genuinely heavy band is found in the main hybridization band gap of the upper and lower hybridzed bands whose heavy effective mass is controled by the CEF splitting. Its presence should profoundly influence the dynamical optical and magnetic res… Show more

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