Photoemission study of AgTO2 delafossites (T=Fe, Co, Ni)
SCIE
SCOPUS
- Title
- Photoemission study of AgTO2 delafossites (T=Fe, Co, Ni)
- Authors
- Kang, JS; Kwak, JH; Shin, YJ; Han, SW; Kim, KH; Min, BI
- Date Issued
- 2000-04-15
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- The electronic structures of the AgTO2 delafossites (T = Fe, Co, Ni) have been investigated using photoemission spectroscopy. T 2p spectra exhibit satellite structures around 6 eV below main peaks, reflecting the strong on-site 3d Coulomb interaction. T 2p spectra of AgTO2 (T=Fe, Co, Ni) are similar to those of alpha-Fe2O3, CoO, and NiO, respectively, suggesting the strong covalent bonding in AgTO2. The valence-band spectrum of Ag0.75CoO2 shows negligible spectral weight near E-F, consistent with its semiconducting behavior. The extracted Ag 4d and Co 3d partial spectral weight (PSW) distributions of Ag0.75CoO2 reveal a Small overlap between these two states, while the O 2p PSW shows a significant overlap with the Co 3d PSW. Such trends in the PSWs are consistent with those in the calculated partial densities of states of AgCoO2.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12049
- DOI
- 10.1103/PhysRevB.61.10682
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 61, no. 16, page. 10682 - 10687, 2000-04-15
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