PSEUDO-SURFACE ACOUSTIC-WAVE STUDIES ON MF2 GAAS(111) HETEROSTRUCTURES USING BRILLOUIN-SCATTERING/

Authors
ALEKSANDROV VV SAPHONOV MV VELASCO VR YAKOVLEV NL MARTYNENKO LP
Citation
Vv. Aleksandrov et al., PSEUDO-SURFACE ACOUSTIC-WAVE STUDIES ON MF2 GAAS(111) HETEROSTRUCTURES USING BRILLOUIN-SCATTERING/, Journal of physics. Condensed matter, 6(18), 1994, pp. 3347-3358
Citations number
35
Categorie Soggetti
Physics, Condensed Matter
Journal title
Journal of physics. Condensed matter → ACNP
ISSN journal
09538984
Volume
6
Issue
18
Year of publication
1994
Pages
3347 - 3358
Database
ISI
SICI code
0953-8984(1994)6:18<3347:PASOMG>2.0.ZU;2-N
Abstract
We present here the registration of pseudo-surface modes, PSMs, propag ating on MF2/GaAs(111) heterostructures (M = Ca, Sr), by means of Bril louin spectroscopy. The observed propagation of PSMs can be reasonably accounted for in terms of the simple theory of elasticity. Neverthele ss, a lowering of 3-7% of the velocity values of the PSMs is detected in the case of leaky modes with relatively strong leakage. The observe d deviations of the velocity of the PSMs are then thought to be connec ted with the presence of a region of roughness of the fluoride/GaAs(11 1) interface extending for several nanometres.