Surface phonon dispersion curves for a hexagonally close packed metal surface: Ru(0001)

Surface phonon dispersion curves have been measured for the clean and hydrogen-covered Ru(0001) surfaces along the [11 2 ̄ 0] and [1 1 ̄ 00] high symmetry directions of the surface Brillouin zone using high resolution He atom scattering. Interatomic force constants and elastic constants were obtaine...

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Veröffentlicht in:	Surface science 1997-02, Vol.372 (1), p.132-144
Hauptverfasser:	Braun, J., Kostov, K.L., Witte, G., Surnev, L., Skofronick, J.G., Safron, S.A., Wöll, Ch
Format:	Artikel
Sprache:	eng
Schlagworte:	Adatoms Applied sciences Atom-solid interactions Condensed matter: structure, mechanical and thermal properties diffraction - elastic Exact sciences and technology inelastic Lattice dynamics Low index single crystal surfaces Metals. Metallurgy Phonon states and bands, normal modes, and phonon dispersion Phonons Phonons and vibrations in crystal lattices Physics Ruthenium scattering Solid surfaces and solid-solid interfaces Surface and interface dynamics and vibrations Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	Surface phonon dispersion curves have been measured for the clean and hydrogen-covered Ru(0001) surfaces along the [11 2 ̄ 0] and [1 1 ̄ 00] high symmetry directions of the surface Brillouin zone using high resolution He atom scattering. Interatomic force constants and elastic constants were obtained by a lattice-dynamical analysis of the experimental data. Significant changes of the dynamical properties of the surface and the interaction strength between impinging He atoms and surface phonons are observed upon reaction of the surface with hydrogen.
ISSN:	0039-6028 1879-2758
DOI:	10.1016/S0039-6028(96)01108-9