Abstract
Raman spectral profiles of folded longitudinal phonon modes in $4H\ensuremath{-},$ $6H\ensuremath{-},$ and $21R\ensuremath{-}$ SiC polytypes which form natural superlattices have been studied experimentally and theoretically. The Raman intensity of the folded longitudinal modes is very weak except for the mode corresponding to a zone-center phonon mode in the $3C$ polytype. The intensity profiles of these modes are interpreted on the basis of the bond polarizability concept when one takes into account difference of the bond Raman polarizability between the cubic and hexagonal environments. The agreement of the measured and calculated intensities indicates that the bond polarizability model can be applied to Raman spectral profiles of the longitudinal folded modes as well as transverse folded modes in SiC.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
