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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/35138
Record Status
Checked
Record Id
35138
Title
Chemical and structural studies of the interaction of molecular sulphur with the GaAs (111)A and (111)B surfaces
Contributors
B Murphy (Dublin City U.)
,
P Moriarty (Dublin City U.)
,
L Roberts (Dublin City U.)
,
AA Cafolla (Dublin City U.)
,
G Hughes (Dublin City U.)
,
L Koenders (Dublin City U. and Physikalisch-Technische Bundesanstalt)
,
P Bailey (DRAL Daresbury Lab.)
Abstract
The interactions of sulfur with the GaAs(111)A and (111)B surfaces has been investigated by synchrotron radiation photoelectron spectroscopy. A scanning tunnelling microscopy study has been performed on the sulfur treated GaAs(111)B surface. Clean GaAs(111) surfaces, prepared in UHV by the thermal removal of an As cap, were exposed in situ to a molecular beam of sulfur. Changes in the surface chemistry and the Fermi level position were monitored as a function of annealing temperature. While this treatment results in complex surface chemistry which displays evidence of both surface and sub-surface sulfur-arsenic exchange reactions, the degree of Fermi level movement would indicate that neither of these surfaces are effectively electronically passivated. The implications of this for surface passivation are considered.
Organisation
SRS
,
DRAL
Keywords
Chemistry
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Surf Sci
317 (1994): 73-83.
doi:10.1016/0039-6028(94)90254-2
1994
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