https://doi.org/10.1007/s100510051014
Ge clusters in Si matrix: structure and dynamics
1
Laboratoire de Physique des Solides (ESA 5477 associée au CNRS) , Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 4, France
2
Laboratoire d'Analyse et d'Architecture des Systèmes, CNRS, 7 avenue du Colonel Roche, 31077 Toulouse Cedex, France
Corresponding author: a landa@cict.fr
Received:
10
December
1998
Revised:
7
April
1999
Published online: 15 December 1999
We have determined by computer simulations, some structural properties of Ge clusters embedded in a Si crystalline host matrix for cluster sizes varying from ≈ 0.5 to 1.5 nm. In order to describe inter-atomic forces we have chosen a Valence Force Field (VFF) semi-empirical potential. Next we have calculated the density of vibrational states by diagonalization of the dynamical matrix defined with the same potential. The influence of the volume/interface ratio of Ge on the vibrational properties is discussed.
PACS: 61.46.+w – Clusters, nanoparticles, and nanocrystalline materials / 63.50.+x – Vibrational states in disordered systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
