Phys. Rev. Lett. 100, 056402 (2008) [4 pages]Photoemission Insight into Heavy-Fermion Behavior in YbRh2Si2Received 19 July 2007; published 5 February 2008 As shown by angle-resolved photoemission (PE), hybridization of bulk Yb 4f2+ 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 Γ̅ . 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.056402
DOI:
10.1103/PhysRevLett.100.056402
PACS:
71.20.Eh, 71.27.+a, 75.30.Mb, 79.60.−i
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.