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Article overview
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Strong hybridization-induced dispersive Kondo resonance in YbAl2 | M. Matsunami
; T. Hajiri
; H. Miyazaki
; M. Kosaka
; S. Kimura
; | Date: |
27 Oct 2012 | Abstract: | We report the electronic structure of a prototypical valence fluctuation
system, YbAl2, using three-dimensional angle-resolved photoemission
spectroscopy. The observed band dispersions and Fermi surfaces are well
described in terms of band structure calculations based on local density
approximation. Strong hybridization between the conduction and 4f bands was
identified on the basis of the periodic Anderson model. Such findings suggest
that the strong hybridization suppresses band renormalization and hence the
electron correlation effect of the Yb 4f states does not work significantly.
Even in this situation, the Kondo resonance peak can be defined and its
dispersion is clearly observed, thus demonstrating the uniqueness of Yb-based
compounds. | Source: | arXiv, 1210.7296 | Services: | Forum | Review | PDF | Favorites |
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