Angle-resolved x-ray-photoemission study of the surface disordering of Pb(100)

Journal Article · Wed May 15 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.12615· OSTI ID:5494101

Murphy, E A; Elsayed-Ali, H E ^[1]; Park, K T; Cao, J; Gao, Y ^[2]

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1. Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (USA)
2. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (USA)

The temperature-dependent forward scattering of the 4{ital f}{sub 7/2} core-level electrons is studied for the (001) and (011) azimuths of Pb(100) using x-ray photoelectron diffraction. Below about 550 K, the decrease in the forward-scattered intensity is attributed to the Debye-Waller effect. Above this temperature, additional attenuation is observed and is attributed to surface disorder. The rate of attenuation dramatically increases above approximately 585 K, and evidence for logarithmic divergence of the thickness of the disordered layer is seen, along with a slight anisotropy that favors disordering along the (011) azimuth. Through analysis of the (001) azimuth, we estimate the disordered layer thickness to be about 4--5 monolayers at 599 K.

• DOE Contract Number: FG02-88ER45376
• OSTI ID: 5494101
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:15; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
HIGH TEMPERATURE
IONIZING RADIATIONS
LEAD
METALS
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SPECTROSCOPY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
ULTRAHIGH VACUUM
X RADIATION