Evidence for oxygen holes due to d-p rehybridization in thermoelectric Sr1-x Rh2 O4

Y. Ishida; T. Baba; R. Eguchi; M. Matsunami; M. Taguchi; A. Chainani; Y. Senba; H. Ohashi; Y. Okamoto; H. Takagi; S. Shin

doi:10.1103/PhysRevB.80.081103

Evidence for oxygen holes due to d-p rehybridization in thermoelectric Sr1-x Rh2 O4

Y. Ishida, T. Baba, R. Eguchi, M. Matsunami, M. Taguchi, A. Chainani, Y. Senba, H. Ohashi, Y. Okamoto, H. Takagi, S. Shin

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Soft-x-ray photoemission and absorption spectroscopies are employed to investigate the electronic structures of Sr1-x Rh2 O4. Similar to the layered cobaltates such as Na1-x CoO2, a valence-band satellite feature (VBS) occurs at higher binding energy to the O2p band. We find that the VBS resonates at the O1s edge. Additionally, core absorption shows clear x dependence in the O1s edge rather than in the Rh3p edge. These results indicate that the holes in the initial state mainly have O2p 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.

Original language	English
Article number	081103
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.80.081103
Publication status	Published - Aug 12 2009
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Evidence for oxygen holes due to d-p rehybridization in thermoelectric Sr1-x Rh2 O4. / Ishida, Y.; Baba, T.; Eguchi, R.; Matsunami, M.; Taguchi, M.; Chainani, A.; Senba, Y.; Ohashi, H.; Okamoto, Y.; Takagi, H.; Shin, S.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 8, 081103, 12.08.2009.

Research output: Contribution to journal › Article › peer-review

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abstract = "Soft-x-ray photoemission and absorption spectroscopies are employed to investigate the electronic structures of Sr1-x Rh2 O4. Similar to the layered cobaltates such as Na1-x CoO2, a valence-band satellite feature (VBS) occurs at higher binding energy to the O2p band. We find that the VBS resonates at the O1s edge. Additionally, core absorption shows clear x dependence in the O1s edge rather than in the Rh3p edge. These results indicate that the holes in the initial state mainly have O2p 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.",

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AU - Ishida, Y.

AU - Baba, T.

AU - Eguchi, R.

AU - Matsunami, M.

AU - Taguchi, M.

AU - Chainani, A.

AU - Senba, Y.

AU - Ohashi, H.

AU - Okamoto, Y.

AU - Takagi, H.

AU - Shin, S.

PY - 2009/8/12

Y1 - 2009/8/12

N2 - Soft-x-ray photoemission and absorption spectroscopies are employed to investigate the electronic structures of Sr1-x Rh2 O4. Similar to the layered cobaltates such as Na1-x CoO2, a valence-band satellite feature (VBS) occurs at higher binding energy to the O2p band. We find that the VBS resonates at the O1s edge. Additionally, core absorption shows clear x dependence in the O1s edge rather than in the Rh3p edge. These results indicate that the holes in the initial state mainly have O2p 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.

AB - Soft-x-ray photoemission and absorption spectroscopies are employed to investigate the electronic structures of Sr1-x Rh2 O4. Similar to the layered cobaltates such as Na1-x CoO2, a valence-band satellite feature (VBS) occurs at higher binding energy to the O2p band. We find that the VBS resonates at the O1s edge. Additionally, core absorption shows clear x dependence in the O1s edge rather than in the Rh3p edge. These results indicate that the holes in the initial state mainly have O2p 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.

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Evidence for oxygen holes due to d-p rehybridization in thermoelectric Sr1-x Rh2 O4

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