PHOTOEMISSION-STUDY OF VALENCE-ELECTRONS IN LA(CO1-XFEX)(13) (X=0,0.2)
SCIE
SCOPUS
- Title
- PHOTOEMISSION-STUDY OF VALENCE-ELECTRONS IN LA(CO1-XFEX)(13) (X=0,0.2)
- Authors
- KANG, JS; SOHN, JG; HONG, JH; HWANG, DW; JEONG, JI; BENNING, PJ; OLSON, CG; MIN, BI
- Date Issued
- 1995-08-01
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- The electronic structure of La(Co-1-Fe-x(x))(13) (x = 0, 0.2) has been investigated by using photoemission spectroscopy. The La 5d and T 3d (T = Fe, Co) partial spectral weights (PSW's) are extracted and compared with the calculated angular-momentum-projected densities of states (PLDOS's). No Co 3d satellite is observed, implying a weak Co 3d Coulomb correlation in this system. La 5d emissions exhibit a weak enhancement near the La 4d absorption edge, from which the La 5d PSW's of La(Co1-xFex)(13) (x = 0, 0.2) have been extracted. For a given x in La(Co1-xFex)(13), the overall features of the La 5d PSW, such as bandwidths and long tails, are rather similar to those of the T 3d PSW, indicating large hybridization between the T 3d and La 5d states. The experimental Co 3d and La 5d PSW's of LaCo13 show a large disagreement with the calculated PLDOS's. With a substitution of Fe for Co, the PSW's of La(Co1-xFex)(13) remain nearly unchanged between x = 0 and 0.2, which is contradictory to the predicted changes in the PLDOS's obtained in the rigid-band scheme. This finding suggests a breakdown of a simple rigid-band approximation in La(Co1-xFex)(13), which is probably due to a large hybridization bonding between Co and Fe 3d electrons.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/11992
- DOI
- 10.1103/PhysRevB.52.4360
- ISSN
- 0163-1829
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 52, no. 6, page. 4360 - 4365, 1995-08-01
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