PICOSECOND RAMAN STUDIES OF THE ELECTRON-PHONON INTERACTIONS IN ALXGA1-XAS - NONMONOTONIC DEPENDENCE UPON THE ALLOY COMPOSITION

Authors
TSEN KT FERRY DK SALVADOR A MORKOC H
Citation
Kt. Tsen et al., PICOSECOND RAMAN STUDIES OF THE ELECTRON-PHONON INTERACTIONS IN ALXGA1-XAS - NONMONOTONIC DEPENDENCE UPON THE ALLOY COMPOSITION, Physical review letters, 80(21), 1998, pp. 4807-4810
Citations number
11
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
21
Year of publication
1998
Pages
4807 - 4810
Database
ISI
SICI code
0031-9007(1998)80:21<4807:PRSOTE>2.0.ZU;2-#
Abstract
The electron-longitudinal-optical- (LO-) phonon interaction in AlxGa1- xAs has been studied for the alloy composition ranging from 0.1 to 0.4 by picosecond Raman spectroscopy. We have found that the relative str ength of the Frohlich interaction of the two LO-phonon modes is a nonl inear function, and increases nonmonotonically with the Al composition . The possible origins of these novel results are discussed in terms o f nonlinear dielectric theory and ordering in the alloy.