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ADSORPTION OF AU ON INSB(100) - A SCANNING-TUNNELING-MICROSCOPY STUDY

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UNSPECIFIED (1993) ADSORPTION OF AU ON INSB(100) - A SCANNING-TUNNELING-MICROSCOPY STUDY. In: 39TH NATIONAL SYMP OF THE AMERICAN VACUUM SOC, CHICAGO, IL, NOV 09-13, 1992. Published in: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 11 (4 Part 1). pp. 981-984. ISSN 0734-2101.

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Abstract

The growth of thin films of Au on InSb(100) has been studied by low energy electron diffraction (LEED) and scanning tunneling microscopy (STM). Adsorption of increasing amounts of gold (up to 6.5 ML) results in gradual disappearance of the LEED pattern. At 0.5 ML coverage, STM images show an even distribution of gold clusters on the well ordered InSb (100)-c(8 X 2) surface. At higher coverages, the gold layer forms parallel ridges. Upon annealing to 625 K, the LEED pattern changes to a (2 square-root 2 X 2 square-root 2)R45-degrees structure. Previous Auger spectroscopy measurements suggest that this is a result of the migration of the Au into the near-surface region of the InSb sample leaving an excess of Sb on the surface. A relatively large sized ( > 500 angstrom X 500 angstrom) ordered region of this surface is also observed by STM. The local translational symmetry, however, differs from that corresponding to the LEED measurements reflecting the different spatial sensitivities of the two structural probes.

Item Type: Conference Item (UNSPECIFIED)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Q Science > QC Physics
Journal or Publication Title: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
Publisher: AMER INST PHYSICS
ISSN: 0734-2101
Official Date: July 1993
Dates:
DateEvent
July 1993UNSPECIFIED
Volume: 11
Number: 4 Part 1
Number of Pages: 4
Page Range: pp. 981-984
Publication Status: Published
Title of Event: 39TH NATIONAL SYMP OF THE AMERICAN VACUUM SOC
Location of Event: CHICAGO, IL
Date(s) of Event: NOV 09-13, 1992

Data sourced from Thomson Reuters' Web of Knowledge

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