RAMAN-SCATTERING BY LONGITUDINAL ACOUSTIC PHONONS IN METALLIC W TI FIBONACCI SUPERLATTICE/

Raman scattering from longitudinal acoustic phonons in W/Ti Fibonacci superlattice is studied. Doubler peaks which result from the folded lo ngitudinal acoustic phonons appear in the Raman spectra as expected. B ased on the Kronig-Penney model or the Rytov model, both the normal-mo de frequencies and scattering intensities are numerically calculated b y using a transfer-matrix method. Noticeable agreement is obtained bet ween the results of quantitative calculations and experimental data. ( C) 1996 American Institute of Physics.