期刊
SURFACE SCIENCE
卷 566, 期 -, 页码 89-93出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2004.05.027
关键词
electron-solid interactions, scattering, diffraction; low energy electron diffraction (LEED); surface relaxation and reconstruction; gallium arsenide; low index single crystal surfaces; molecular beam epitaxy
The tensor LEED analysis of the intensities of electron beams diffracted from the GaAs(001)-c(4 x 4) grown by molecular beam epitaxy (MBE) has been performed. Surface structures with symmetrical and asymmetrical 3-dimer models in the topmost layer have been investigated. The best-fit structure with central dimer compressed with respect to the As-4 molecule by 20% has been found. Model with asymmetrically arranged dimers fits experimental data better than that with symmetrical alignment. (C) 2004 Elsevier B.V. All rights reserved.
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