X-ray and neutron scattering study of Si-rich Si-Ge single crystals
- Resource Type
- Journal Article
- Authors
- Source
- Physical Review B; 63; 3; Other Information: DOI: 10.1103/PhysRevB.63.035204; Othernumber: PRBMDO000063000003035204000001; 010103PRB; PBD: 15 Jan 2001
- Subject
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ACOUSTICS
ALLOYS
ATOMIC DISPLACEMENTS
ATOMS
MONOCRYSTALS
NEUTRONS
PHONONS
SCATTERING
- Language
- English
- ISSN
- 0163-1829
The local atomic environments of homogeneous Si-rich Si-Ge single crystals were studied using x-ray and neutron diffuse scattering. No evidence of either chemical short-range order or clustering was observed. Static atomic displacements, however, were clearly present and are consistent with an expansion of the lattice in the vicinity of the Ge atoms. The dispersion of the acoustic phonons was also measured using inelastic neutron scattering. The acoustic modes of the Si-Ge alloy were found to lie nearer those of pure Si than expected from the homologous relationship found between pure Si and pure Ge.