ATOMIC-SCALE SURFACE-STRUCTURE AND ULTRASMOOTH MORPHOLOGY OF MOLECULAR-BEAM-EPITAXY-GROWN ALAS (001)-(3X2)

Authors
GWO S OHNO H TOKUMOTO H
Citation
S. Gwo et al., ATOMIC-SCALE SURFACE-STRUCTURE AND ULTRASMOOTH MORPHOLOGY OF MOLECULAR-BEAM-EPITAXY-GROWN ALAS (001)-(3X2), Physical review. B, Condensed matter, 55(4), 1997, pp. 1962-1965
Citations number
15
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
55
Issue
4
Year of publication
1997
Pages
1962 - 1965
Database
ISI
SICI code
0163-1829(1997)55:4<1962:ASAUMO>2.0.ZU;2-X
Abstract
We have studied the surface atomic structure and electronic properties of the molecular-beam-epitaxy-grown AlAs(001)-(3x2) film by in situ s canning tunneling microscopy and spectroscopy. A structural model is p roposed for AlAs(001)-(3x2), in which the x2 ordering arises from the formation of unusual double pi-bonded As dimers along the [110] direct ion and the x3 ordering results from the missing As-dimer rows in the [<(1)over bar 10>] direction on the topmost As-terminated layer. Scann ing tunneling spectroscopic study directly reveals the energies and sp atial locations of the surface states.