Moriarty, Philip, Ma, Y.R., Dunn, A. W., Beton, P. H., Henini, M., McGinley, Colm, McLoughlin, Eilish ORCID: 0000-0001-7991-7134, Cafolla, Attilio A. ORCID: 0000-0003-1475-3807, Hughes, Greg ORCID: 0000-0003-1310-8961, Downes, S., Teehan, D. and Murphy, B. (1997) Absence of long-range ordered reconstruction on the GaAs(311)A surface. Physical Review B, 55 (23). pp. 15397-15400. ISSN 0163-1829
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.
Metadata
Item Type: | Article (Published) |
---|---|
Refereed: | Yes |
Subjects: | Physical Sciences > Physics |
DCU Faculties and Centres: | DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences |
Publisher: | The American Physical Society |
Official URL: | http://dx.doi.org/10.1103/PhysRevB.55.15397 |
Copyright Information: | © 1997 The American Physical Society |
Use License: | This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License |
ID Code: | 15596 |
Deposited On: | 03 Aug 2010 14:59 by DORAS Administrator . Last Modified 05 Nov 2020 17:21 |
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