Orbital character of the conduction band of delafossite PdCoO2 studied by polarization-dependent soft x-ray absorption spectroscopy
SCIE
SCOPUS
- Title
- Orbital character of the conduction band of delafossite PdCoO2 studied by polarization-dependent soft x-ray absorption spectroscopy
- Authors
- Noh, HJ; Jeong, J; Jeong, J; Sung, H; Park, KJ; Kim, JY; Kim, HD; Kim, SB; Kim, K; Min, BI
- Date Issued
- 2009-08
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We present the x-ray absorption spectra that show the Co valence state and the orbital character of the conduction band of delafossite PdCoO2. The Co 2p x-ray absorption spectra of PdCoO2 and PtCoO2 show that the Co ions have the trivalent low-spin configuration. The polarization-dependent O 1s absorption spectra reveal that the unoccupied density of states (DOS) near the Fermi level consists mainly of the Pd 4d(3z2-r2) states. The experimental O 2p(z) partial DOS (PDOS) is extracted from the polarization-dependent O 1s spectra and is compared with the theoretical PDOS by the local-density approximation, showing a good agreement. These observations provide a consistent picture on the origin of the good conductivity of the delafossite oxides.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12208
- DOI
- 10.1103/PhysRevB.80.073104
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 80, no. 7, page. 73104, 2009-08
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