Growth and structural characterization of a lead overlayer on cu(100)

Wei Li; J. S. Lin; G. Vidali; M. Karimi

doi:10.1116/1.577491

Growth and structural characterization of a lead overlayer on cu(100)

Wei Li, J. S. Lin, G. Vidali, M. Karimi

Department of Physics

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25 Scopus citations

Abstract

Ordered phases of Pb on Cu(100) have been studied using helium beam scattering and performing charge density calculations. At low adsorption temperature, we obtain a (5x5) R tan^-1-(3/4) phase. A structure model with square symmetry and superstructure buckling has been put forward. Calculated charge density profile which shows a buckled superstructure is in good agreement with our structural model. We have also investigated the C(5⇃2X⇃2) R 45° phase which is adsorbed at high temperature. By analyzing measured diffraction peaks, we showed that this overlayer is flat and the lead atoms near the antiphase domain walls are sitting at the same levels as the other lead atoms. The thermal behavior of diffraction peak intensities shows that this phase undergoes a first order transition at 503 K.

Original language	English (US)
Pages (from-to)	1707-1711
Number of pages	5
Journal	Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume	9
Issue number	3
DOIs	https://doi.org/10.1116/1.577491
State	Published - May 1991

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

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abstract = "Ordered phases of Pb on Cu(100) have been studied using helium beam scattering and performing charge density calculations. At low adsorption temperature, we obtain a (5x5) R tan-1-(3/4) phase. A structure model with square symmetry and superstructure buckling has been put forward. Calculated charge density profile which shows a buckled superstructure is in good agreement with our structural model. We have also investigated the C(5⇃2X⇃2) R 45° phase which is adsorbed at high temperature. By analyzing measured diffraction peaks, we showed that this overlayer is flat and the lead atoms near the antiphase domain walls are sitting at the same levels as the other lead atoms. The thermal behavior of diffraction peak intensities shows that this phase undergoes a first order transition at 503 K.",

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AU - Li, Wei

AU - Lin, J. S.

AU - Vidali, G.

AU - Karimi, M.

PY - 1991/5

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N2 - Ordered phases of Pb on Cu(100) have been studied using helium beam scattering and performing charge density calculations. At low adsorption temperature, we obtain a (5x5) R tan-1-(3/4) phase. A structure model with square symmetry and superstructure buckling has been put forward. Calculated charge density profile which shows a buckled superstructure is in good agreement with our structural model. We have also investigated the C(5⇃2X⇃2) R 45° phase which is adsorbed at high temperature. By analyzing measured diffraction peaks, we showed that this overlayer is flat and the lead atoms near the antiphase domain walls are sitting at the same levels as the other lead atoms. The thermal behavior of diffraction peak intensities shows that this phase undergoes a first order transition at 503 K.

AB - Ordered phases of Pb on Cu(100) have been studied using helium beam scattering and performing charge density calculations. At low adsorption temperature, we obtain a (5x5) R tan-1-(3/4) phase. A structure model with square symmetry and superstructure buckling has been put forward. Calculated charge density profile which shows a buckled superstructure is in good agreement with our structural model. We have also investigated the C(5⇃2X⇃2) R 45° phase which is adsorbed at high temperature. By analyzing measured diffraction peaks, we showed that this overlayer is flat and the lead atoms near the antiphase domain walls are sitting at the same levels as the other lead atoms. The thermal behavior of diffraction peak intensities shows that this phase undergoes a first order transition at 503 K.

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Growth and structural characterization of a lead overlayer on cu(100)

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