Dynamical properties of an isolated step

A. Virlouvet, H. Grimech, A. Khater, Y. Pennec, K. Maschke

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The dynamics for a model system of an isolated infinite step in a surface are presented. The model is simple, treating the monatomic step as the interface between two coupled semi-infinite and single semi-infinite atomic layers. The breakdown of translational symmetry perpendicular to the step edge gives rise to several Rayleigh-like branches localized in the neighbourhood of the step. It is seen that a step may lift the polarization degeneracy of the ordered surface Rayleigh mode along the atomic rows parallel to and in the neighbourhood of the step edge. Typical dispersion curves for these modes along the step edge are given with their polarizations. The vibrational Green functions are calculated for the system, and the spectral densities are presented numerically for atomic sites that constitute a minimum representative set in the neighbourhood of the step. A hyperfine resonance structure is obtained that permits the analysis of the evolution of the dynamics from one half-space to the other.

Original languageEnglish
Pages (from-to)7589-7603
Number of pages15
JournalJournal of Physics Condensed Matter
Volume8
Issue number41
DOIs
Publication statusPublished - 7 Oct 1996
Externally publishedYes

Fingerprint

Polarization
Spectral density
Green's function
polarization
half spaces
Green's functions
breakdown
symmetry
curves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Virlouvet, A., Grimech, H., Khater, A., Pennec, Y., & Maschke, K. (1996). Dynamical properties of an isolated step. Journal of Physics Condensed Matter, 8(41), 7589-7603. https://doi.org/10.1088/0953-8984/8/41/008

Dynamical properties of an isolated step. / Virlouvet, A.; Grimech, H.; Khater, A.; Pennec, Y.; Maschke, K.

In: Journal of Physics Condensed Matter, Vol. 8, No. 41, 07.10.1996, p. 7589-7603.

Research output: Contribution to journalArticle

Virlouvet, A, Grimech, H, Khater, A, Pennec, Y & Maschke, K 1996, 'Dynamical properties of an isolated step', Journal of Physics Condensed Matter, vol. 8, no. 41, pp. 7589-7603. https://doi.org/10.1088/0953-8984/8/41/008
Virlouvet A, Grimech H, Khater A, Pennec Y, Maschke K. Dynamical properties of an isolated step. Journal of Physics Condensed Matter. 1996 Oct 7;8(41):7589-7603. https://doi.org/10.1088/0953-8984/8/41/008
Virlouvet, A. ; Grimech, H. ; Khater, A. ; Pennec, Y. ; Maschke, K. / Dynamical properties of an isolated step. In: Journal of Physics Condensed Matter. 1996 ; Vol. 8, No. 41. pp. 7589-7603.
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