A SHG-study of Na-induced Si (111) 7 x 7 surface symmetry changes

Authors
Zhang, J Bordo, VG Rubahn, HG
Citation
J. Zhang et al., A SHG-study of Na-induced Si (111) 7 x 7 surface symmetry changes, SOL ST COMM, 118(6), 2001, pp. 273-277
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
118
Issue
6
Year of publication
2001
Pages
273 - 277
Database
ISI
SICI code
0038-1098(2001)118:6<273:ASONS(>2.0.ZU;2-C
Abstract
We demonstrate via measurement of normal-incidence, near-resonant, angular dependent second harmonic generation a strong change of Si(111)7 x 7 surfac e symmetry as a consequence of submonolayer adsorption of sodium atoms. The results are interpreted by assuming that a new surface structure with lowe r symmetry coexists on the Na/Si(111)7 x 7 interface with the Sm-symmetry o f the clean Si(111) surface. This new surface structure could be due to an Na-induced surface reconstruction. (C) 2001 Elsevier Science Ltd. All right s reserved.