Type

Journal Article

Authors

B. Murphy
D. Teehan
S. Downes
Greg Hughes
Attilio A. Cafolla
Eilish McLoughlin
Colm McGinley
M. Henini
P. H. Beton
A. W. Dunn
and 2 others

Subjects

Physics

Topics
synchrotron radiation gaas structural model anisotropy surface reconstruction components surface roughness physics

Absence of long-range ordered reconstruction on the GaAs(311)A surface (1997)

Abstract We have investigated the decapped GaAs(311)A surface using both scanning tunneling microscopy and synchrotron-radiation photoemission. While our data are in broad agreement with the structural model of GaAs(311)A proposed in a recent study [Wassermeier et al., Phys. Rev. B 51, 14 721 (1995)], we find considerable differences in the surface order. In particular, the As dimer rows are unbroken over much shorter length scales and are highly kinked. We observe a correspondingly lower degree of anisotropy in the surface roughness than that previously reported. An (8×1) reconstruction was not observed. An analysis of As 3d and Ga 3d core-level photoemission spectra suggests that surface As atoms are in only one bonding configuration while surface Ga adopts two different bonding states. We discuss possible origins for the core-level spectra surface components.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health
Ireland -> Dublin City University -> Subject = Physical Sciences: Physics
Ireland -> Dublin City University -> Subject = Physical Sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health: School of Physical Sciences

Full list of authors on original publication

B. Murphy, D. Teehan, S. Downes, Greg Hughes, Attilio A. Cafolla, Eilish McLoughlin, Colm McGinley, M. Henini, P. H. Beton, A. W. Dunn and 2 others

Experts in our system

1
Barry Murphy
Trinity College Dublin
Total Publications: 18
 
2
Greg Hughes
Dublin City University
Total Publications: 29
 
3
Attilio A. Cafolla
Dublin City University
Total Publications: 26