Photoemission insight into heavy-fermion behavior in YbRh2Si2 |
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Authors: | Vyalikh D V Danzenbächer S Yaresko A N Holder M Kucherenko Yu Laubschat C Krellner C Hossain Z Geibel C Shi M Patthey L Molodtsov S L |
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Institution: | Institut für Festk?rperphysik, Technische Universit?t Dresden, D-01062 Dresden, Germany. |
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Abstract: | As shown by angle-resolved photoemission (PE), hybridization of bulk Yb 4f(2+) states with a shallow-lying valence band of the same symmetry leads in YbRh2Si2 to dispersion of a 4f PE signal in the region of the Kondo resonance with a Fermi-energy crossing close to Gammaover ]. Additionally, renormalization of the valence state results in the formation of a heavy band that disperses parallel to the 4f originating signal. The symmetry and character of the states are probed by circular dichroism and the photon-energy dependence of the PE cross sections. |
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