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Title: Surface electronic structure of GaAs(110) studied by Auger photoelectron coincidence spectroscopy

Abstract

Auger photoelectron coincidence spectroscopy has been used to study the {ital M}{sub 4,5}{ital VV} Auger spectra of GaAs(110). Using this technique, the Ga and As spectra can be separated and studied independently. The line shape of the As-{ital M}{sub 4,5}{ital VV} measured in coincidence with the As 3{ital d} photoemission line differs significantly from the conventional Auger spectrum. This is attributed to the surface electronic properties of the system. In addition, it is found that the {ital ss} component of the As spectrum is more intense than expected based on calculations using atomic matrix elements. The Ga-{ital M}{sub 4,5}{ital VV} spectrum, of which only the {ital pp} component is observed, agrees well with that expected from an independent electron model. A first principles electronic structure calculation of a five-layer GaAs(110) slab has been performed to aid in the interpretation of the Auger spectra.

Authors:
 [1];  [2];  [1];  [3];  [4]
  1. Department of Physics and Astronomy and The Laboratory for Surface Modification, Rutgers University, Piscataway, New Jersey 08855-0849 (USA)
  2. Department of Physics, Brandeis University, Waltham, Massachusetts 02254 (USA)
  3. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973 (USA)
  4. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (USA)
Publication Date:
OSTI Identifier:
5487647
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)
Additional Journal Information:
Journal Volume: 9:3; Journal ID: ISSN 0734-2101
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GALLIUM ARSENIDES; ELECTRONIC STRUCTURE; AUGER ELECTRON SPECTROSCOPY; COINCIDENCE METHODS; LINE WIDTHS; ARSENIC COMPOUNDS; ARSENIDES; COUNTING TECHNIQUES; ELECTRON SPECTROSCOPY; GALLIUM COMPOUNDS; PNICTIDES; SPECTROSCOPY; 360603* - Materials- Properties

Citation Formats

Bartynski, R A, Jensen, E, Garrison, K, Hulbert, S L, and Weinert, M. Surface electronic structure of GaAs(110) studied by Auger photoelectron coincidence spectroscopy. United States: N. p., 1991. Web. doi:10.1116/1.577542.
Bartynski, R A, Jensen, E, Garrison, K, Hulbert, S L, & Weinert, M. Surface electronic structure of GaAs(110) studied by Auger photoelectron coincidence spectroscopy. United States. doi:10.1116/1.577542.
Bartynski, R A, Jensen, E, Garrison, K, Hulbert, S L, and Weinert, M. Wed . "Surface electronic structure of GaAs(110) studied by Auger photoelectron coincidence spectroscopy". United States. doi:10.1116/1.577542.
@article{osti_5487647,
title = {Surface electronic structure of GaAs(110) studied by Auger photoelectron coincidence spectroscopy},
author = {Bartynski, R A and Jensen, E and Garrison, K and Hulbert, S L and Weinert, M},
abstractNote = {Auger photoelectron coincidence spectroscopy has been used to study the {ital M}{sub 4,5}{ital VV} Auger spectra of GaAs(110). Using this technique, the Ga and As spectra can be separated and studied independently. The line shape of the As-{ital M}{sub 4,5}{ital VV} measured in coincidence with the As 3{ital d} photoemission line differs significantly from the conventional Auger spectrum. This is attributed to the surface electronic properties of the system. In addition, it is found that the {ital ss} component of the As spectrum is more intense than expected based on calculations using atomic matrix elements. The Ga-{ital M}{sub 4,5}{ital VV} spectrum, of which only the {ital pp} component is observed, agrees well with that expected from an independent electron model. A first principles electronic structure calculation of a five-layer GaAs(110) slab has been performed to aid in the interpretation of the Auger spectra.},
doi = {10.1116/1.577542},
journal = {Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)},
issn = {0734-2101},
number = ,
volume = 9:3,
place = {United States},
year = {1991},
month = {5}
}