Electronic structure of 3 d1 configuration vanadium oxides studied by soft X-ray and hard X-ray photoemission spectroscopy

R. Eguchi; M. Taguchi; M. Matsunami; K. Horiba; K. Yamamoto; A. Chainani; Y. Takata; M. Yabashi; D. Miwa; Y. Nishino; K. Tamasaku; T. Ishikawa; Y. Senba; H. Ohashi; I. H. Inoue; Y. Muraoka; Z. Hiroi; S. Shin

doi:10.1016/j.elspec.2006.12.055

Electronic structure of 3 d¹ configuration vanadium oxides studied by soft X-ray and hard X-ray photoemission spectroscopy

R. Eguchi, M. Taguchi, M. Matsunami, K. Horiba, K. Yamamoto, A. Chainani, Y. Takata, M. Yabashi, D. Miwa, Y. Nishino, K. Tamasaku, T. Ishikawa, Y. Senba, H. Ohashi, I. H. Inoue, Y. Muraoka, Z. Hiroi, S. Shin

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

16 Citations (Scopus)

Abstract

We investigate the electronic structure of 3 d¹ configuration vanadium oxides (VO₂, SrVO₃ and CaVO₃) using soft X-ray (SX) and hard X-ray (HX) photoemission spectroscopy (PES). The valence band spectra of VO₂ in SX- and HX-PES clearly show the opening of a gap at E_F across the metal-insulator transition. Spectral changes in the V 2p and O 1s core levels were also observed. In addition, 3 d¹ configuration correlated metals SrVO₃ and CaVO₃ are typical materials whose valence band spectra are compared with dynamical mean-field theory. The V 2p and V 1s core level HX-PES of SrVO₃ and CaVO₃ show clear additional well-screened features. These features originate from bulk screening by a coherent band at E_F. These spectra are nicely reproduced by a cluster model calculation, indicating a difference of the parameter V^* for the interaction strength between the central V 3d orbitals and the coherent band.

Original language	English
Pages (from-to)	421-425
Number of pages	5
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	156-158
DOIs	https://doi.org/10.1016/j.elspec.2006.12.055
Publication status	Published - May 2007
Externally published	Yes

Keywords

Bulk electronic structure
Photoemission
Vanadium oxides

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

Access to Document

10.1016/j.elspec.2006.12.055

Cite this

Eguchi, R., Taguchi, M., Matsunami, M., Horiba, K., Yamamoto, K., Chainani, A., Takata, Y., Yabashi, M., Miwa, D., Nishino, Y., Tamasaku, K., Ishikawa, T., Senba, Y., Ohashi, H., Inoue, I. H., Muraoka, Y., Hiroi, Z., & Shin, S. (2007). Electronic structure of 3 d¹ configuration vanadium oxides studied by soft X-ray and hard X-ray photoemission spectroscopy. Journal of Electron Spectroscopy and Related Phenomena, 156-158, 421-425. https://doi.org/10.1016/j.elspec.2006.12.055

Eguchi, R, Taguchi, M, Matsunami, M, Horiba, K, Yamamoto, K, Chainani, A, Takata, Y, Yabashi, M, Miwa, D, Nishino, Y, Tamasaku, K, Ishikawa, T, Senba, Y, Ohashi, H, Inoue, IH, Muraoka, Y, Hiroi, Z & Shin, S 2007, 'Electronic structure of 3 d¹ configuration vanadium oxides studied by soft X-ray and hard X-ray photoemission spectroscopy', Journal of Electron Spectroscopy and Related Phenomena, vol. 156-158, pp. 421-425. https://doi.org/10.1016/j.elspec.2006.12.055

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abstract = "We investigate the electronic structure of 3 d1 configuration vanadium oxides (VO2, SrVO3 and CaVO3) using soft X-ray (SX) and hard X-ray (HX) photoemission spectroscopy (PES). The valence band spectra of VO2 in SX- and HX-PES clearly show the opening of a gap at EF across the metal-insulator transition. Spectral changes in the V 2p and O 1s core levels were also observed. In addition, 3 d1 configuration correlated metals SrVO3 and CaVO3 are typical materials whose valence band spectra are compared with dynamical mean-field theory. The V 2p and V 1s core level HX-PES of SrVO3 and CaVO3 show clear additional well-screened features. These features originate from bulk screening by a coherent band at EF. These spectra are nicely reproduced by a cluster model calculation, indicating a difference of the parameter V* for the interaction strength between the central V 3d orbitals and the coherent band.",

keywords = "Bulk electronic structure, Photoemission, Vanadium oxides",

author = "R. Eguchi and M. Taguchi and M. Matsunami and K. Horiba and K. Yamamoto and A. Chainani and Y. Takata and M. Yabashi and D. Miwa and Y. Nishino and K. Tamasaku and T. Ishikawa and Y. Senba and H. Ohashi and Inoue, {I. H.} and Y. Muraoka and Z. Hiroi and S. Shin",

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doi = "10.1016/j.elspec.2006.12.055",

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T1 - Electronic structure of 3 d1 configuration vanadium oxides studied by soft X-ray and hard X-ray photoemission spectroscopy

AU - Eguchi, R.

AU - Taguchi, M.

AU - Matsunami, M.

AU - Horiba, K.

AU - Yamamoto, K.

AU - Chainani, A.

AU - Takata, Y.

AU - Yabashi, M.

AU - Miwa, D.

AU - Nishino, Y.

AU - Tamasaku, K.

AU - Ishikawa, T.

AU - Senba, Y.

AU - Ohashi, H.

AU - Inoue, I. H.

AU - Muraoka, Y.

AU - Hiroi, Z.

AU - Shin, S.

PY - 2007/5

Y1 - 2007/5

N2 - We investigate the electronic structure of 3 d1 configuration vanadium oxides (VO2, SrVO3 and CaVO3) using soft X-ray (SX) and hard X-ray (HX) photoemission spectroscopy (PES). The valence band spectra of VO2 in SX- and HX-PES clearly show the opening of a gap at EF across the metal-insulator transition. Spectral changes in the V 2p and O 1s core levels were also observed. In addition, 3 d1 configuration correlated metals SrVO3 and CaVO3 are typical materials whose valence band spectra are compared with dynamical mean-field theory. The V 2p and V 1s core level HX-PES of SrVO3 and CaVO3 show clear additional well-screened features. These features originate from bulk screening by a coherent band at EF. These spectra are nicely reproduced by a cluster model calculation, indicating a difference of the parameter V* for the interaction strength between the central V 3d orbitals and the coherent band.

AB - We investigate the electronic structure of 3 d1 configuration vanadium oxides (VO2, SrVO3 and CaVO3) using soft X-ray (SX) and hard X-ray (HX) photoemission spectroscopy (PES). The valence band spectra of VO2 in SX- and HX-PES clearly show the opening of a gap at EF across the metal-insulator transition. Spectral changes in the V 2p and O 1s core levels were also observed. In addition, 3 d1 configuration correlated metals SrVO3 and CaVO3 are typical materials whose valence band spectra are compared with dynamical mean-field theory. The V 2p and V 1s core level HX-PES of SrVO3 and CaVO3 show clear additional well-screened features. These features originate from bulk screening by a coherent band at EF. These spectra are nicely reproduced by a cluster model calculation, indicating a difference of the parameter V* for the interaction strength between the central V 3d orbitals and the coherent band.

KW - Bulk electronic structure

KW - Photoemission

KW - Vanadium oxides

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