Observation of a kink during the formation of the Kondo resonance band in a heavy-fermion system
SCIE
SCOPUS
- Title
- Observation of a kink during the formation of the Kondo resonance band in a heavy-fermion system
- Authors
- Hong Chul Choi; Haule, K; Kotliar, G; MIN, BYUNG IL; Shim, JH
- Date Issued
- 2013-09-06
- Publisher
- PHYSICAL REVIEW B
- Abstract
- We have shown that the kink behavior in the spectral function of a heavy fermion can appear during the formation of the Kondo resonance (KR) band and the hybridization gap. We have investigated the heavy fermion compound CeCoGe2, using a combined approach of the density functional theory and the dynamical mean field theory. Low temperature T spectral functions show dispersive KR states, similarly to the recent experimental observation. During the evolution from the non-f conduction band state at high T to the dispersive KR band state at low T, which have topologically different band shapes, we have found the existence of kinks in the non-f spectral function near the Fermi level E-F. The observation of kink is clearly in correspondence with the multiple temperature scales of the formation of the KR band.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15225
- DOI
- 10.1103/PHYSREVB.88.125111
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 88, no. 12, page. 125111-1 - 125111-5, 2013-09-06
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