LATTICE-DYNAMICS OF THE (7X7) RECONSTRUCTED SI(111) SURFACE FROM HIGH-RESOLUTION HELIUM ATOM SCATTERING

Authors
LANGE G TOENNIES JP RUGGERONE P BENEDEK G
Citation
G. Lange et al., LATTICE-DYNAMICS OF THE (7X7) RECONSTRUCTED SI(111) SURFACE FROM HIGH-RESOLUTION HELIUM ATOM SCATTERING, Europhysics letters, 41(6), 1998, pp. 647-652
Citations number
27
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
41
Issue
6
Year of publication
1998
Pages
647 - 652
Database
ISI
SICI code
0295-5075(1998)41:6<647:LOT(RS>2.0.ZU;2-T
Abstract
The low-energy part of the surface vibrational spectrum of the Si(111) (7x7) surface has been measured along both symmetry directions using h igh-resolution helium atom scattering. The analysis of the experimenta l data with a simple model enables the identification of contributions arising from the geometrical back-folding of the Rayleigh wave and fr om vibrations of adatoms, in excellent agreement with recent ab initio results.