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Updated: Jul 6, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Photoemission insight into heavy-fermion behavior in YbRh2Si2
D V Vyalikh1, S Danzenbächer, A N Yaresko
1Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany.
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 Gamma[over ]. 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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