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  • Title: Energy dispersion of 4f-derived emissions in photoelectron spectra of the heavy-fermion compound YbIr2Si2.
    Author: Danzenbächer S, Kucherenko Y, Laubschat C, Vyalikh DV, Hossain Z, Geibel C, Zhou XJ, Yang WL, Mannella N, Hussain Z, Shen ZX, Molodtsov SL.
    Journal: Phys Rev Lett; 2006 Mar 17; 96(10):106402. PubMed ID: 16605769.
    Abstract:
    Angle-resolved photoemission spectra of the heavy-fermion system YbIr(2)Si(2) are reported that reveal strong momentum (k) dependent splittings of the 4f(13) bulk and surface emissions around the expected intersection points of the 4f final states with valence bands in the Brillouin zone. The obtained dispersion is explained in terms of a simplified periodic Anderson model by a k dependence of the electron hopping matrix element disregarding clearly interpretation in terms of a single-impurity model.
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