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  Electronic structure reconstruction by trimer formation in CsW2O6 studied by x-ray photoelectron spectroscopy

Nakamura, R., Takegami, D., Melendez-Sans, A., Tjeng, L. H., Okawa, M., Miyoshino, T., et al. (2022). Electronic structure reconstruction by trimer formation in CsW2O6 studied by x-ray photoelectron spectroscopy. Physical Review B, (19): 195104, pp. 1-6. doi:10.1103/PhysRevB.106.195104.

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 Creators:
Nakamura, R.1, Author
Takegami, D.2, Author           
Melendez-Sans, A.2, Author           
Tjeng, L. H.3, Author           
Okawa, M.1, Author
Miyoshino, T.1, Author
Saini, N. L.1, Author
Kitamura, M.1, Author
Shiga, D.1, Author
Kumigashira, H.1, Author
Yoshimura, M.1, Author
Tsuei, K.-D.1, Author
Okamoto, Y.1, Author
Mizokawa, T.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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Free keywords: Binary alloys, Binding energy, Electronic structure, Energy gap, Metal insulator boundaries, Photoelectrons, Photons, Semiconductor insulator boundaries, X ray photoelectron spectroscopy, Core-level peaks, Electronic.structure, Fermi edge, Final state, High temperature metallics, Metal-insulators transitions, Metallic phase, Soft X-ray photoelectron spectroscopy, Structure reconstruction, X-ray photoelectrons, Metal insulator transition
 Abstract: We have studied the electronic structure of CsW2O6 across its metal-insulator transition by means of hard/soft x-ray photoelectron spectroscopy. In the high-temperature metallic phase, the W 5d band exhibits a clear Fermi edge. The W 4f7/2 and 4f5/2 core-level peaks are accompanied by shoulders on their lower binding energy side. The shoulder and main peaks, respectively, are attributed to the well- and poorly screened final states where the screening is due to the W 5d electronic states in the vicinity of the chemical potential. In going from 300 to 180 K (across the metal-insulator transition), a band gap of about 0.2 eV is created at the Fermi level. The origin of the band gap can be assigned to the trimerization of the W sites. The W 4f and 5d spectra exclude the possibility of charge disproportionation and suggest moderate electronic correlation effects. © 2022 American Physical Society.

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Language(s): eng - English
 Dates: 2022-11-022022-11-02
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevB.106.195104
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: (19) Sequence Number: 195104 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008