Grazing-incidence x-ray scattering on the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Au(111) phase transition

Xm, Zhu; Feidenhans’l, R.; Zabel, H.; Als‐Nielsen, J.; Du, Ruxu; Cp, Flynn; Grey, François

doi:10.1103/physrevb.37.7157

Cited by 32 publications

(7 citation statements)

References 13 publications

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“…Of the different crystal faces, the (1 1 1) face has received less attention. The order-disorder surface phase transition has been studied by X-ray diffraction [31], but the atomic structure of the (1 1 1) surface has to our knowledge not been reported yet. A corrosion study using STM has been reported and, in agreement with our results, suggests the formation of a protecting gold layer as reason for the passivating behaviour after the first stages of corrosion [32].…”

Section: Discussionmentioning

confidence: 97%

In situ X-ray analysis of solid/electrolyte interfaces: electrodeposition of Cu and Co on Si(111):H and GaAs(001) and corrosion of Cu3Au(111)

et al. 2004

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Section: Discussionmentioning

confidence: 97%

In situ X-ray analysis of solid/electrolyte interfaces: electrodeposition of Cu and Co on Si(111):H and GaAs(001) and corrosion of Cu3Au(111)

et al. 2004

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“…8 Segregation can be studied by analyzing the energy balance at zero temperature. [9][10][11][12][13][14][15][16][17][18] Concerning specifically Au segregation to the surface, apparently there are conflicting results, both for experimental and theoretical work. Theoretical and experimental studies of Cu 3 Au(111) are scarce compared to those of the (100) surface, and they have mainly focused on the order-disorder transition.…”

Section: Introductionmentioning

confidence: 99%

First-principles calculations and XPS measurements of gold segregation at the Cu3Au(111) surface

Moreira

Fontes

Niehus

et al. 2012

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Articles you may be interested inEffect of gold subsurface layer on the surface activity and segregation in Pt/Au/Pt3M (where M = 3d transition metals) alloy catalyst from first-principles J. Chem. Phys. 142, 034707 (2015); 10.1063/1.4905919Catalytic activity of Pd ensembles over Au(111) surface for CO oxidation: A first-principles study Position of segregated Al atoms and the work function: Experimental low energy electron diffraction intensity analysis and first-principles calculation of the ( √ 3 × √ 3 ) R 30 ° superlattice phase on the (111) surface of a Cu -9 at. % Al alloy A combination of first-principles calculations based on density-functional theory, pseudopotentials, and x-ray photoelectron spectroscopy (XPS) measurements is used in order to study Au segregation in Cu 3 Au(111) surfaces. Our theoretical results suggest Au compositions from 50% to 75% in the topmost layer, depending on the chemical potentials of the atomic species. This strong Au segregation is restricted to the topmost surface plane and it is supported by the XPS measurements in a semiquantitative manner.

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“…26, 41, and 42͒ and RHEED; 43 it exhibits different behavior that may arise from antiphase boundaries. 44 For the ͑111͒ surface, x-ray techniques 45,46 and reflection electron microscopy 47 indicate a continuous transition as well as possible irreversible roughening. Dura introduced the use of RHEED to study the ͑111͒ surface 43 and reported a critical exponent ␤ϭ0.57Ϯ0.10.…”

Section: Introductionmentioning

confidence: 99%

Resonant RHEED measurements of surface order onCu3Au(111)films

Bonham

Flynn

1998

Phys. Rev. B

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We have determined the long-range-order parameter of the Cu 3 Au(111) surface using resonant reflection high-energy electron diffraction ͑RHEED͒. The samples were prepared by molecular-beam epitaxy. In the resonance condition, diffracted beams propagate along the surface and enhance the surface sensitivity of the probe. A comparison between the order parameters derived using different resonances establishes that the diffraction amplitudes determine the order parameter with quantitative precision. The order parameter is found to obey a power-law behavior as a function of temperature near the order-disorder transformation temperature T c . The critical exponent determined from the observations is ␤ϭ0.51Ϯ0.03. The result agrees well with the mean-field prediction ␤ϭ 1 2 , and this indication that critical fluctuations are not important is consistent with the fact that antiphase domains boundaries intersect the ͑111͒ surface. Experiments using disordered Cu 3 Au grown on an ordered crystal confirm that the effective probe depth of the resonant RHEED method is only 1.1 ML, so that the measured order parameter is relevant to the outer surface layers alone.

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Grazing-incidence x-ray scattering on theCu3Au(111) phase transition

Cited by 32 publications

References 13 publications

In situ X-ray analysis of solid/electrolyte interfaces: electrodeposition of Cu and Co on Si(111):H and GaAs(001) and corrosion of Cu3Au(111)

In situ X-ray analysis of solid/electrolyte interfaces: electrodeposition of Cu and Co on Si(111):H and GaAs(001) and corrosion of Cu3Au(111)

First-principles calculations and XPS measurements of gold segregation at the Cu3Au(111) surface

Resonant RHEED measurements of surface order onCu3Au(111)films

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