Atomic geometry and electronic properties of the Ge(111)2×1-Sb surface studied by scanning tunneling microscopy/spectroscopy and core-level photoemission
| Autor: | Pekka Laukkanen, M. Ahola-Tuomi, Mikhail Kuzmin, I. J. Vayrynen, R.E. Perälä |
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| Rok vydání: | 2007 |
| Předmět: |
Chemistry
Scanning tunneling spectroscopy Analytical chemistry Synchrotron radiation chemistry.chemical_element Germanium Surfaces and Interfaces Substrate (electronics) Condensed Matter Physics Molecular physics Surfaces Coatings and Films law.invention X-ray photoelectron spectroscopy law Materials Chemistry Scanning tunneling microscope Spectroscopy Surface reconstruction |
| Zdroj: | Surface Science. 601:837-843 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/j.susc.2006.11.029 |
| Popis: | By scanning tunneling microscopy and spectroscopy (STM/S) and high-resolution core-level photoemission using synchrotron radiation, we have investigated the atomic structure and electronic properties of Sb-induced 2 × 1 reconstruction on Ge(1 1 1). Our results support well the zigzag-chain model proposed for this phase in the literature; in particular, the STM images visualize the Sb zigzag (Seiwatz) chain in a real space, and the STS I – V spectrum suggests this surface to be semiconducting, in good agreement with the atomic configuration proposed. However, a closer inspection of the STM results does not support the buckling of Sb chains reported in earlier studies. Moreover, the analysis of the Sb 4d core-level line shape of the (2 × 1) reconstruction shows that the bonding state of the Sb atoms is very similar, suggesting an unbuckled Seiwatz chain. In addition, the Ge 3d core-level emission reveals only one component, giving evidence for the ideal bulk-terminated structure of the Ge substrate. |
| Databáze: | OpenAIRE |
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