Phase behavior of the Au(111) surface: Discommensurations and kinks

Journal Article · Mon Dec 24 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.3313· OSTI ID:5966593

Huang, K G; Gibbs, D ^[1]; Zehner, D M ^[2]; Sandy, A R; Mochrie, S G.J. ^[3]

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1. Department of Physics, Brookhaven National Laboratory, Upton, NY (USA)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN (USA)
3. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA (USA)

The clean Au(111) surface is found, using x-ray diffraction, to reconstruct between 300 and 1250 K with two distinct phases. Below 865 K, the surface structure consists of an equiilbrium density of kinks between rotationally equivalent domains, each of which is itself composed of a sequence of uniaxial discommensurations. Above 880 K, the arrangement of kinks and discommensurations is disordered, which results in an isotropic compression of the reconstructed layer. The phase transition between the two structures is first order.

• DOE Contract Number: AC02-76CH00016; AC05-84OR21400
• OSTI ID: 5966593
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:26; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
CLEANING
COHERENT SCATTERING
COMPRESSION
CRYSTAL STRUCTURE
DATA
DIFFRACTION
ELEMENTS
EXPERIMENTAL DATA
GOLD
INFORMATION
ISOTROPY
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
PHASE STUDIES
SCATTERING
SURFACE CLEANING
SURFACE FINISHING
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION