INFLUENCE OF SURFACE DISORDER ON RHEED PATTERNS FROM GAAS(001)-2X4 SURFACES

DC FieldValueLanguage
dc.contributor.authorLARSEN, PK
dc.contributor.authorMEYEREHMSEN, G
dc.date.accessioned2021-12-23T16:12:45Z-
dc.date.available2021-12-23T16:12:45Z-
dc.date.issued1990
dc.identifier.issn00396028
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/10271-
dc.description.abstractReflection high-energy electron diffraction measurements have been carried out for a nearly perfect and a disordered GaAs(001)-2 x 4 surface in the [1BAR10] azimuth. The surfaces were prepared in-situ by molecular beam epitaxy and the measurements were made at a substrate temperature of 560-degrees-C under different flux conditions, giving the different degrees of surface ordering. Diffracted intensity distributions along various reciprocal surface lattice rods were measured for different angles of incidence using a primary beam energy of 15 keV. Drastic differences with surface order were found for both the (quasi) elastically diffracted beams (rocking curves) and the diffuse beams. The rocking curves can be interpreted largely by Bragg reflection from the bulk crystal and a number of causes for the intensity changes are given. In the case of the disordered surface the intensity distributions along the reciprocal lattice rods are dominated by broad diffuse peaks which occur at the intersection of reciprocal rods and Kikuchi lines. It is shown that while a kinematical model is unable to explain the experimental observations, a previously published model provides a very satisfactory interpretation.
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofSURFACE SCIENCE
dc.subjectChemistry
dc.subjectChemistry, Physical
dc.subjectENERGY ELECTRON-DIFFRACTION
dc.subjectGAAS
dc.subjectGROWTH
dc.subjectPhysics
dc.subjectPhysics, Condensed Matter
dc.subjectSTEPPED SURFACES
dc.subjectSYSTEM
dc.titleINFLUENCE OF SURFACE DISORDER ON RHEED PATTERNS FROM GAAS(001)-2X4 SURFACES
dc.typejournal article
dc.identifier.doi10.1016/0039-6028(90)90740-Y
dc.identifier.isiISI:A1990EV01400021
dc.description.volume240
dc.description.issue1-3
dc.description.startpage168
dc.description.endpage180
dc.publisher.placePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
dcterms.isPartOf.abbreviationSurf. Sci.
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