Core-level shifts of the c(8 x 2)-reconstructed InAs(100) and InSb(100) surfaces
Author
Summary, in English
We have studied In-stabilized c(8 2)-reconstructed InAs(1 0 0) and InSb(1 0 0) semiconductor surfaces, which play a key role in growing improved III-V interfaces for electronics devices, by core-level photoelectron spectroscopy and first-principles calculations. The calculated surface core-level shifts (SCLSs) for the zeta and zeta a models, which have been previously established to describe the atomic structures of the III-V(1 00)c(8 x 2) surfaces, yield hitherto not reported interpretation for the As 3d, In 4d, and Sb 4d core-level spectra of the III-V(1 00)c(8 x 2) surfaces, concerning the number and origins of SCLSs. The fitting analysis of the measured spectra with the calculated zeta and zeta a SCLS values shows that the InSb spectra are reproduced by the zeta SCLSs better than by the zeta a SCLSs. Interestingly, the zeta a fits agree better with the InAs spectra than the zeta fits do, indicating that the zeta a model describes the InAs surface better than the InSb surface. These results are in agreement with previous X-ray diffraction data. Furthermore, an introduction of the complete-screening model, which includes both the initial and final state effects, does not improve the fitting of the InSb spectra, proposing the suitability of the initial-state model for the SCLSs of the III-V(1 0 0)c(8 x 2) surfaces. The found SCLSs are discussed with the ab initio on-site charges. (C) 2010 Elsevier B.V. All rights reserved.
Department/s
Publishing year
2010
Language
English
Pages
52-57
Publication/Series
Journal of Electron Spectroscopy and Related Phenomena
Volume
177
Issue
1
Document type
Journal article
Publisher
Elsevier
Topic
- Natural Sciences
- Physical Sciences
Keywords
- Indium
- arsenide (InAs)
- Indium antimonide (InSb)
- Surface reconstruction
- Ab initio calculations
- spectroscopy
- Surface core-level shift (SCLS)
- Synchrotron radiation photoelectron
Status
Published
ISBN/ISSN/Other
- ISSN: 0368-2048