OBSERVATION OF ACOUSTIC MODES INSIDE THE PHONON-DISPERSION GAPS

Authors
LEMOS V PILLA O MONTAGNA M DESOUZA CF
Citation
V. Lemos et al., OBSERVATION OF ACOUSTIC MODES INSIDE THE PHONON-DISPERSION GAPS, Superlattices and microstructures, 17(1), 1995, pp. 51-54
Citations number
14
Categorie Soggetti
Physics, Condensed Matter
Journal title
Superlattices and microstructures → ACNP
ISSN journal
07496036
Volume
17
Issue
1
Year of publication
1995
Pages
51 - 54
Database
ISI
SICI code
0749-6036(1995)17:1<51:OOAMIT>2.0.ZU;2-G
Abstract
Raman spectra of Si/GexSi1-x superlattices have been measured, probing close to the mini Brillouin zone edge. The data reveal sharp lines ap pearing between those of folded phonon doublets. These lines have been interpreted with the aid of a computational method based on the photo elastic theory for low frequency Raman scattering by longitudinal acou stic phonons in finite size superlattices.