Electronic Properties of GaAs-(Al,Ga)As Quasiperiodic Heterostructures
Final rept. 1 Jun 1986-31 Aug 1989
MICHIGAN UNIV ANN ARBOR DEPT OF PHYSICS
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We have studied random, Fibonacci and Thue-Morse Gallium Arsenide- based superlattices using Raman scattering and other optical techniques. The non-resonant Raman data provides information on Fourier components of the modulation while resonant results reveal dips associated with gaps in the phonon spectrum. The latter have been explained in terms of a model showing that phonons with wavevector close to the zone edge and zone centers avoid the surface. Keywords Heterostructures, Quasiperiodic structures, Optical properties, Acoustic phonons.
- Solid State Physics