Journal
SURFACE SCIENCE
Volume 482, Issue -, Pages 587-592Publisher
ELSEVIER
DOI: 10.1016/S0039-6028(01)00927-X
Keywords
indium arsenide; low energy electron diffraction (LEED); scanning tunneling microscopy; electron emission
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We have investigated clean In-terminated InAs(001)(4 x 2)-c(8 x 2) surface by LEED, STM and high-resolution core-level and valence band (VB) spectroscopies. The In4d and As3d core levels showed the presence of chemically shifted components. The decomposition of In4d core level exhibited a new surface component located close to that of free indium, metal. This indicates that the origin of the electron emission at the Fermi level measured in the VB spectra is probably due to the free In charge, STM measurements showed a uniform distribution of charge on the In-rows. which are highly ordered over large areas of the surface. (C) 2001 Elsevier Science B.V. All rights reserved.
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