Abstract
Unenhanced, non-resonant Raman spectra of a H-terminated vicinal Si(111) surface, Si[6(111)-(112)], with dihydride-terminated bilayer steps have been measured. All four SiH stretches (and a ≈4% ML kink-defect mode) can be observed if both the excitation and detection geometries are favorable. A method for extracting the orientation of adsorbates using polarized, angle-resolved Raman scattering is presented. Assuming the C1 mode corresponds to a localized SiH stretch, the step dihydride is found to be rotated 37 ± 4° away from the surface normal. This value is in agreement with recent ab initio cluster calculations.
Original language | English |
---|---|
Pages (from-to) | 183-191 |
Number of pages | 9 |
Journal | Journal of Electron Spectroscopy and Related Phenomena |
Volume | 64-65 |
Issue number | C |
DOIs | |
Publication status | Published - Dec 12 1993 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Atomic and Molecular Physics, and Optics
- Surfaces and Interfaces