Structure and phases of the Au(001) surface : X-ray scattering measurements

X-ray diffraction is used to study the phase behavior and structure of the Au(001) surface between 300 K and the triple point. For {ital T}{gt}1170 K, the x-ray reflectivity is consistent with a thin, disordered surface film. At 1170 K, there is a reversible transition to an incommensurate, hexagona...

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Bibliographic Details
Published in:Physical review letters 1990-06, Vol.64 (24), p.2925-2928
Main Authors: MOCHRIE, S. G. J, ZEHNER, D. M, OCKO, B. M, GIBBS, D
Format: Article
Language:English
Subjects:
Applied sciences
COHERENT SCATTERING
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
CRYSTAL STRUCTURE
DATA
DIFFRACTION
ELEMENTS
Exact sciences and technology
EXPERIMENTAL DATA
GOLD
HIGH TEMPERATURE
INFORMATION
MATERIALS SCIENCE
MEDIUM TEMPERATURE
METALS
Metals, semimetals and alloys
Metals. Metallurgy
NUMERICAL DATA
OPTICAL PROPERTIES
ORIENTATION
PHASE STUDIES
PHYSICAL PROPERTIES
Physics
REFLECTIVITY
SCATTERING
Solid surfaces and solid-solid interfaces
Specific materials
SURFACE PROPERTIES
Surface structure and topography
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
THIN FILMS
TRANSITION ELEMENTS 360102 > Metals & Alloys-- Structure & Phase Studies
TRIPLE POINT
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION
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Description
Summary:X-ray diffraction is used to study the phase behavior and structure of the Au(001) surface between 300 K and the triple point. For {ital T}{gt}1170 K, the x-ray reflectivity is consistent with a thin, disordered surface film. At 1170 K, there is a reversible transition to an incommensurate, hexagonal overlayer on top of the square substrate. At 970 K, the orientation of the hexagonal layer rotates discontinuously by 0.81{degree} with no observable change in incommensurability.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.64.2925