High-resolution core-level photoemission study of Ge(111)2×1–Sb and Ge(111)(√3×√3)R30°–Bi reconstructions
| Autor: | Pekka Laukkanen, R.E. Perälä, Mikhail Kuzmin, M. Ahola-Tuomi, I. J. Vayrynen |
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| Rok vydání: | 2007 |
| Předmět: |
Radiation
Materials science Analytical chemistry chemistry.chemical_element Germanium Substrate (electronics) Condensed Matter Physics Electron spectroscopy Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials Spectral line shape Crystallography X-ray photoelectron spectroscopy chemistry Ab initio quantum chemistry methods Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | Journal of Electron Spectroscopy and Related Phenomena. 159:24-29 |
| ISSN: | 0368-2048 |
| DOI: | 10.1016/j.elspec.2007.03.003 |
| Popis: | Using high-resolution core-level photoelectron spectroscopy with synchrotron radiation, we have studied Ge(1 1 1)2 × 1–Sb and Ge(1 1 1)(√3 × √3) R 30°–Bi reconstructions formed at the metal coverage of 1 and 1/3 monolayers, respectively. The spectral line shape analysis shows that for the both surfaces, the Ge 3d emission includes one component, giving evidence for the bulk-terminated structure of the Ge substrate in these phases. The Bi 5d emission from the Ge(1 1 1)(√3 × √3) R 30°–Bi surface reveals an intense component related to the Bi atoms at the T4 site in the √3 structure, in agreement with previous ab initio calculations. Another small Bi 5d component is assigned to Bi–Bi bondings in metallic Bi clusters. The Sb 4d spectra of the Ge(1 1 1)(2 × 1)–Sb surface can be reproduced well by a single component, suggesting that the Sb atoms in the Seiwatz chains have similar bonding configuration. |
| Databáze: | OpenAIRE |
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