Structural studies of sub monolayer Sn/Cu(0 0 1) structures

J Lallo; L.V Goncharova; B.J Hinch; S Rangan; R.A Bartynski; D.R Strongin

doi:10.1016/j.susc.2008.04.028

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Structural studies of sub monolayer Sn/Cu(0 0 1) structures

Journal article

Peer reviewed

Structural studies of sub monolayer Sn/Cu(0 0 1) structures

J Lallo, L.V Goncharova, B.J Hinch, S Rangan, R.A Bartynski and D.R Strongin

Surface science, Vol.602(14), pp.2348-2357

2008

DOI: https://doi.org/10.1016/j.susc.2008.04.028

Abstract

Adatoms

Atom-solid scattering and diffraction-elastic

Copper

Scanning tunneling microscopy

Surface relaxation and reconstruction

Surface stress

Surface structure, morphology, roughness, and topography

Tin

Helium atom scattering (HAS) and scanning tunneling microscopy (STM) have been used to investigate five ordered phases formed by Sn-evaporation and deposition on room temperature Cu(0 0 1) surfaces. Complementary Auger (AES) and electron diffraction (LEED) studies have also been performed. Glide plane symmetry has been noted in a p(2 × 6) phase. The c(4 × 8), p(3√2 × √2), and c(4 × 4) phases exhibit measurable lateral relaxations. The c(4 × 8) and c(4 × 4) phases have Sn in distorted nearest-neighbor adsorption sites. New structural models are proposed for four Sn/Cu phases. Each of these models is discussed in light of the lateral stress relief mechanisms that are operative. STM topographic details are used to argue in favor of the prevalence of 2-D alloy-like structures in most phases. We speculate also on the necessity of subsurface vacancies in formation of the p2mg, p(2 × 6) ordered phase.

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Details

Title: Structural studies of sub monolayer Sn/Cu(0 0 1) structures
Creators: J Lallo - Department of Chemistry and Chemical Biology, Laboratory of Surface Modification, Rutgers University, NJ 08854, United States
L.V Goncharova - Department of Chemistry and Chemical Biology, Laboratory of Surface Modification, Rutgers University, NJ 08854, United States
B.J Hinch - Department of Chemistry and Chemical Biology, Laboratory of Surface Modification, Rutgers University, NJ 08854, United States
S Rangan - Department of Physics and Astronomy, Laboratory of Surface Modification, Rutgers University, NJ 08854, United States
R.A Bartynski - Department of Physics and Astronomy, Laboratory of Surface Modification, Rutgers University, NJ 08854, United States
D.R Strongin - Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
Publication Details: Surface science, Vol.602(14), pp.2348-2357
Date published: 2008
Publisher: Elsevier B.V
Academic Unit: Physics and Astronomy (SAS); Laboratory for Surface Modification
Language: English
Resource Type: Journal article
Identifiers: 991031665325604646