Resonant Phonons in Adsorbed Slabs

• Authors: L. Dobrzynski , A. Akjouj , B. Syla , B. Djafari-Rouhani
• Languages of publication: EN

Abstracts

EN

Resonant phonons, sometimes also called leaky waves, are phonons associated with a crystal defect, a surface, an adsorbed layer and whose frequencies fall inside the bulk crystal band. Such resonant phonons were studied experimentally and theoretically before for clean surfaces and for adsorbed monolayers. We present here a study of resonant phonons associated with the adsorption of a slab of L monolayers on a substrate. With the help of a simple atomic model, we obtained a closed form expression giving the variation of the transverse phonon density of states associated with the adsorption of the slab. An application which qualitatively simulates the adsorption of L monolayers of Ge on Si shows the existence of well-defined resonant phonons within the bulk acoustic band of the substrate.

Keywords

EN

68.60.-p

Discipline

• 68.60.-p: Physical properties of thin films, nonelectronic

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 81
• Issue: 1
• Pages: 85-90

Dates

published

1992-01

received

1991-05-21

Contributors

author

L. Dobrzynski

• Equipe Internationale de Dynamique des Interfaces, Laboratoire de Dynamique et Structure des Matériaux Moléculaires, U.R.A. au C.N.R.S. n° 801, U.F.R. de Physique, Université de Lille I, 59655 Villeneuve d'Ascq Cedex, France

author

A. Akjouj

• Equipe Internationale de Dynamique des Interfaces, Laboratoire de Dynamique et Structure des Matériaux Moléculaires, U.R.A. au C.N.R.S. n° 801, U.F.R. de Physique, Université de Lille I, 59655 Villeneuve d'Ascq Cedex, France

author

B. Syla

• Equipe Internationale de Dynamique des Interfaces, Laboratoire de Dynamique et Structure des Matériaux Moléculaires, U.R.A. au C.N.R.S. n° 801, U.F.R. de Physique, Université de Lille I, 59655 Villeneuve d'Ascq Cedex, France

author

B. Djafari-Rouhani

• Equipe Internationale de Dynamique des Interfaces, Laboratoire de Dynamique et Structure des Matériaux Moléculaires, U.R.A. au C.N.R.S. n° 801, U.F.R. de Physique, Université de Lille I, 59655 Villeneuve d'Ascq Cedex, France

Identifiers

DOI

10.12693/APhysPolA.81.85