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• W1996136688 endingPage "16594" @default.
• W1996136688 startingPage "16587" @default.
• W1996136688 abstract "The Sm-on-Pt(100) overlayer system has been studied by photoelectron spectroscopy, scanning tunneling microscopy (STM), and low-energy electron diffraction (LEED) at room temperature. As Sm overlayers were evaporated onto the Pt(100)-hex-R0.7ifmmode^circelsetextdegreefi{} reconstructed single-crystal surface, the initial growth of the interface was studied. Photoelectron spectroscopy and LEED indicate that Sm and Pt has formed an intermixed, disordered phase in the surface. The Pt 4f core-level spectra indicate the existence of an unresolved surface component that disappears with Sm deposition. For all Sm coverages (0.3--20 AA{}), trivalent Sm was observed. Some divalent Sm was seen after ensuremath{sim}20 AA{} Sm deposition, and was believed to stem from Sm atoms at the surface. LEED and STM show that Sm adsorption induces a local lifting of the hexagonal reconstruction. The first monolayer of the Sm-Pt compound grows as long (100--1000 AA{}), narrow (30--50 AA{}) islands directed along the direction of longest periodicity of the reconstructed structure. At the same time, the uncovered areas display the hexagonally reconstructed structure. The Sm-Pt islands are seen to be centered on the elevated ridges of the reconstruction. There are no indications of preferential nucleation centers, such as steps or defects. Two effects are discussed to contribute simultaneously to the observed island shape: (1) an anisotropic Sm diffusion, favoring diffusion along the reconstruction ridges, and (2) lifting of the reconstruction along the elevated ridges is the energetically favorable process, due to lower Pt-Pt coordination in these on-top sites. textcopyright{} 1996 The American Physical Society." @default.
• W1996136688 created "2016-06-24" @default.
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• W1996136688 date "1996-06-15" @default.
• W1996136688 modified "2023-09-25" @default.
• W1996136688 title "Photoelectron spectroscopy and scanning tunneling microscopy studies of the initial growth of the Sm-on-Pt(100) interface" @default.
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• W1996136688 doi "https://doi.org/10.1103/physrevb.53.16587" @default.
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