One-dimensional commensurate-incommensurate transition: Bromide on the Au(100) electrode

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.R7654· OSTI ID:279786

Ocko, B M; Magnussen, O M ^[1]; Wang, J X ^[2]; Wandlowski, T ^[3]

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1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Department of Applied Science, Brookhaven National Laboratory, Upton, New York 11973 (United States)
3. Department of Electrochemistry, University of Ulm, D-89069 Ulm (Germany)

In an electrochemical environment, bromide adsorbed on the Au(100) surface forms a commensurate {ital c}({radical}2{times}2{radical}2){ital R}45{degree} monolayer over a range of applied potentials. At a critical potential the bromide monolayer undergoes a transition to a uniaxial-incommensurate {ital c}({radical}2{times}{ital p}){ital R}45{degree} monolayer, where {ital p} continuously decreases from 2{radical}2 with increasing potential. In the incommensurate phase, the data support an atomic model with uniform compression rather than sharp, well-ordered domain walls. The quadratic scaling of the peak widths with the incommensurate component of the wave vector suggests that the incommensurate phase exhibits {open_quote}{open_quote}cumulative disorder.{close_quote}{close_quote} {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 279786
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 12 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
BROMINE
COMMENSURATE-INCOMMENSURATE TRANSFORMATIONS
ELECTROCHEMICAL COATING
ELECTROCHEMISTRY
GOLD
LAYERS
MONOLAYERS
PHASE TRANSFORMATIONS
SCALING
SORPTIVE PROPERTIES
SURFACE PROPERTIES
SURFACE STRUCTURE
SYNCHROTRON RADIATION
X-RAY DIFFRACTION
XRD