| Issue |
Europhys. Lett.
Volume 41, Number 6, March II 1998
|
|
|---|---|---|
| Page(s) | 647 - 652 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00207-5 | |
| Published online | 01 September 2002 | |
Lattice dynamics of the 
reconstructed
Si(111) surface from high-resolution helium atom scattering
1
Max-Planck-Institut für Strömungsforschung,
Bunsenstraße 10, D-37073 Göttingen, Germany
2
Fritz-Haber-Institut, Faradayweg 4-6, D-14195 Berlin,
Germany
3
Istituto Nazionale di Fisica della Materia, Dipartimento di Fisica
dell'Università, Via Celoria 16, I-20133 Milano, Italy
Received:
23
June
1997
Accepted:
23
January
1998
The low-energy part of the surface vibrational spectrum of the Si(111)(7×7) surface has been measured along both symmetry directions using high-resolution helium atom scattering. The analysis of the experimental data with a simple model enables the identification of contributions arising from the geometrical back-folding of the Rayleigh wave and from vibrations of adatoms, in excellent agreement with recent ab initio results.
PACS: 68.35.Ja – Surface and interface dynamics and vibrations
© EDP Sciences, 1998
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