Hard X-ray and soft X-ray photoemission study of vanadium oxides

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

Research output: Contribution to journalArticle

Abstract

We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with photoemission spectroscopy (PES) using hard X-rays (HX) (h ν∼ 8 keV) and soft X-rays (SX) (h ν∼ 900 eV). In HX-PES results, the V 2p core levels of SrVO3 and CaVO3 show clear additional intensity, which are not observed in SX-PES. These features originate from bulk screening by coherent states at Fermi level as observed in other 3d transition metal oxides. From the comparison between SrVO3 and CaVO3 in HX-PES, the intensity in SrVO3 is nearly similar to CaVO3. The results suggest screening from coherent states is more efficient in HX-PES compared to SX-PES.

Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 2
DOIs
Publication statusPublished - Mar 2007
Externally publishedYes

Fingerprint

Vanadium
vanadium oxides
Photoemission
Photoelectron spectroscopy
Oxides
X ray spectroscopy
photoelectric emission
X rays
x rays
spectroscopy
Screening
screening
Core levels
Fermi level
Electronic structure
Transition metals
metal oxides
transition metals
electronic structure

Keywords

  • Bulk electronic structure
  • Photoemission

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Eguchi, R., Takata, Y., Matsunami, M., Horiba, K., Yamamoto, K., Taguchi, M., ... Shin, S. (2007). Hard X-ray and soft X-ray photoemission study of vanadium oxides. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 2). https://doi.org/10.1016/j.jmmm.2006.10.207

Hard X-ray and soft X-ray photoemission study of vanadium oxides. / Eguchi, Ritsuko; Takata, Y.; Matsunami, M.; Horiba, K.; Yamamoto, K.; Taguchi, M.; Chainani, A.; Yabashi, M.; Miwa, D.; Nishino, Y.; Tamasaku, K.; Ishikawa, T.; Senba, Y.; Ohashi, H.; Inoue, I. H.; Shin, S.

In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 2, 03.2007.

Research output: Contribution to journalArticle

Eguchi, R, Takata, Y, Matsunami, M, Horiba, K, Yamamoto, K, Taguchi, M, Chainani, A, Yabashi, M, Miwa, D, Nishino, Y, Tamasaku, K, Ishikawa, T, Senba, Y, Ohashi, H, Inoue, IH & Shin, S 2007, 'Hard X-ray and soft X-ray photoemission study of vanadium oxides', Journal of Magnetism and Magnetic Materials, vol. 310, no. 2 SUPPL. PART 2. https://doi.org/10.1016/j.jmmm.2006.10.207
Eguchi, Ritsuko ; Takata, Y. ; Matsunami, M. ; Horiba, K. ; Yamamoto, K. ; Taguchi, M. ; Chainani, A. ; Yabashi, M. ; Miwa, D. ; Nishino, Y. ; Tamasaku, K. ; Ishikawa, T. ; Senba, Y. ; Ohashi, H. ; Inoue, I. H. ; Shin, S. / Hard X-ray and soft X-ray photoemission study of vanadium oxides. In: Journal of Magnetism and Magnetic Materials. 2007 ; Vol. 310, No. 2 SUPPL. PART 2.
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AU - Eguchi, Ritsuko

AU - Takata, Y.

AU - Matsunami, M.

AU - Horiba, K.

AU - Yamamoto, K.

AU - Taguchi, M.

AU - Chainani, A.

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 - Shin, S.

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AB - We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with photoemission spectroscopy (PES) using hard X-rays (HX) (h ν∼ 8 keV) and soft X-rays (SX) (h ν∼ 900 eV). In HX-PES results, the V 2p core levels of SrVO3 and CaVO3 show clear additional intensity, which are not observed in SX-PES. These features originate from bulk screening by coherent states at Fermi level as observed in other 3d transition metal oxides. From the comparison between SrVO3 and CaVO3 in HX-PES, the intensity in SrVO3 is nearly similar to CaVO3. The results suggest screening from coherent states is more efficient in HX-PES compared to SX-PES.

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KW - Photoemission

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