AVS 45th International Symposium
    Surface Science Division Friday Sessions
       Session SS1-FrM

Paper SS1-FrM11
A NIXSW Study of the InP(001)-(4x2) and InP(001)-(1x1)-Cl Surfaces

Friday, November 6, 1998, 11:40 am, Room 308

Session: Surface Structure and Strain
Presenter: R.G. Jones, University of Nottingham, United Kingdom
Authors: A.A. Davis, University of Nottingham, United Kingdom
C.J. Fisher, University of Nottingham, United Kingdom
R.G. Jones, University of Nottingham, United Kingdom
G. Scragg, University of Warwick, United Kingdom
J. Ludeke, University of Warwick, United Kingdom
D.P. Woodruff, University of Warwick, United Kingdom
B.C.C. Cowie, Daresbury Laboratory, United Kingdom
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The Normal Incidence X-ray Standing Wave (NIXSW) technique has been used to study the reconstructed, indium terminated InP(001)-(4x2) surface and the InP(001)-(1x1)-Cl chemisorbed surface, using the (002), (20-2) and (113) Bragg reflections. Auger electrons and photoelectrons from the In, P and Cl were used to monitor the X-ray absorption profiles. The reconstructed, indium terminated surface was found to contain In dimers orientated in the direction of the four times periodicity, which is in contrary to earlier studies, but in agreement with the findings of Sung et al.@footnote 1@ The chemisorbed chlorine surface had chlorine bonded to the top layer In atoms with the In-Cl bond probably extending along the [110] substrate direction. The inadvisability of using low energy Auger peaks, and the effects of non-dipole photoemission in XSW determinations, are also discussed. @FootnoteText@ @footnote 1@M. M. Sung et al; Surface Sci. 322(1995)116