Photoelectron spectra of the late rare-earth misfit layer compounds (LnS)1+xTS2 (Ln = Tb, Dy, Ho; T = Nb, Ta)
| Autor: | Ga Wiegers, C. Haas, C.M. Fang |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Valence (chemistry)
Materials science Photoemission spectroscopy Energy level splitting Electronic structure Electron Condensed Matter Physics Spectral line Electronic Optical and Magnetic Materials Crystallography Nuclear magnetic resonance X-ray photoelectron spectroscopy Electrical and Electronic Engineering Electronic band structure |
| Zdroj: | Physica B: Condensed Matter. 233:134-138 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/s0921-4526(97)89578-6 |
| Popis: | Photoemission spectra (XPS and UPS) are presented for the valence band of misfit layer compounds (LnS) 1+ x TS 2 with Ln = Dy, Ho or Tb; T = Nb or Ta. The Nb 4d z 2 (or Ta 5d z 2 ) conduction band is almost filled, which indicates a charge transfer of slightly less than one electron per T from the LnS to the TS 2 layers. The spectra are similar to the spectrum of (LaS) 1.14 NbS 2 , except for the Ln 4f contribution. The rare-earth atoms in these compounds are trivalent. The localized 4f states shift about 2 eV to lower energy, as compared with the rare-earth metals. The electronic structure of the rare-earth misfit layer compounds is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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