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Title: Lattice dynamics of ultrathin layers of KBr grown epitaxially on RbCl(001)

Abstract

High-resolution helium-atom scattering experiments were performed on epitaxially grown layers of KBr on a RbCl(001) substrate for films 1, 2, and 3 ML thick. The layer-by-layer growth was monitored {ital in} {ital situ} by measuring the intensity of the specularly scattered He beam versus coverage. Measurements of the single-phonon inelastic scattering were carried out on each succeeding layer to determine the surface-phonon dispersion in both the {Gamma}{ital M} and {Gamma}{ital X} high-symmetry directions of the surface Brillouin zone. Shell-model potential parameters were determined in a consistent fashion for the four anion-cation constituents at the interface, which gave a good fit to the dispersion curve data from 1-, 2-, and 3-ML KBr/RbCl epitaxially grown systems as reported in this study and, in addition, the bulk and clean surface dispersions of KBr, RbCl, KCl, and RbBr were fit by the same parameters. {copyright} {ital 1996 The American Physical Society.}

Authors:
; ; ; ; ; ;  [1]; ;  [2]
  1. Departments of Physics and Chemistry and Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306 (United States)
  2. Institut fuer Theoretische Physik, Universitaet Regensburg, Universitaetsstrasse 32, 93040 Regensburg (Germany)
Publication Date:
OSTI Identifier:
284369
DOE Contract Number:  
FG05-85ER45208
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 53; Journal Issue: 20; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; POTASSIUM BROMIDES; CRYSTAL GROWTH; EPITAXY; RUBIDIUM CHLORIDES; INELASTIC SCATTERING; HELIUM 4 BEAMS; SURFACE PROPERTIES; BRILLOUIN ZONES

Citation Formats

Gillman, E S, Baker, J, Hernandez, J J, Bishop, G G, Li, J A, Safron, S A, Skofronick, J G, Bonart, D, and Schroeder, U. Lattice dynamics of ultrathin layers of KBr grown epitaxially on RbCl(001). United States: N. p., 1996. Web. doi:10.1103/PhysRevB.53.13891.
Gillman, E S, Baker, J, Hernandez, J J, Bishop, G G, Li, J A, Safron, S A, Skofronick, J G, Bonart, D, & Schroeder, U. Lattice dynamics of ultrathin layers of KBr grown epitaxially on RbCl(001). United States. doi:10.1103/PhysRevB.53.13891.
Gillman, E S, Baker, J, Hernandez, J J, Bishop, G G, Li, J A, Safron, S A, Skofronick, J G, Bonart, D, and Schroeder, U. Wed . "Lattice dynamics of ultrathin layers of KBr grown epitaxially on RbCl(001)". United States. doi:10.1103/PhysRevB.53.13891.
@article{osti_284369,
title = {Lattice dynamics of ultrathin layers of KBr grown epitaxially on RbCl(001)},
author = {Gillman, E S and Baker, J and Hernandez, J J and Bishop, G G and Li, J A and Safron, S A and Skofronick, J G and Bonart, D and Schroeder, U},
abstractNote = {High-resolution helium-atom scattering experiments were performed on epitaxially grown layers of KBr on a RbCl(001) substrate for films 1, 2, and 3 ML thick. The layer-by-layer growth was monitored {ital in} {ital situ} by measuring the intensity of the specularly scattered He beam versus coverage. Measurements of the single-phonon inelastic scattering were carried out on each succeeding layer to determine the surface-phonon dispersion in both the {Gamma}{ital M} and {Gamma}{ital X} high-symmetry directions of the surface Brillouin zone. Shell-model potential parameters were determined in a consistent fashion for the four anion-cation constituents at the interface, which gave a good fit to the dispersion curve data from 1-, 2-, and 3-ML KBr/RbCl epitaxially grown systems as reported in this study and, in addition, the bulk and clean surface dispersions of KBr, RbCl, KCl, and RbBr were fit by the same parameters. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.53.13891},
journal = {Physical Review, B: Condensed Matter},
number = 20,
volume = 53,
place = {United States},
year = {1996},
month = {5}
}