Aug, 2009
Evidence for oxygen holes due to d-p rehybridization in thermoelectric Sr1-xRh2O4
PHYSICAL REVIEW B
- Volume
- 80
- Number
- 8
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevB.80.081103
- Publisher
- AMER PHYSICAL SOC
Soft-x-ray photoemission and absorption spectroscopies are employed to investigate the electronic structures of Sr1-xRh2O4. Similar to the layered cobaltates such as Na1-xCoO2, a valence-band satellite feature (VBS) occurs at higher binding energy to the O 2p band. We find that the VBS resonates at the O 1s edge. Additionally, core absorption shows clear x dependence in the O 1s edge rather than in the Rh 3p edge. These results indicate that the holes in the initial state mainly have O 2p character presumably due to d-p rehybridizations affected by Sr2+ vacancy potentials. The resultant inhomogeneous charge texture may have impact on the thermoelectric transport properties at low x.
- Link information
- ID information
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- DOI : 10.1103/PhysRevB.80.081103
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000269639300003