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- W1995515094 abstract "Spatial and dynamical properties of optical phonons in AlxGa1−xAs alloys and GaAs/AlxGa1−xAs quantum wells are studied. An isotopically disordered harmonic crystal model is developed to study spatial properties of optical phonons in AlxGa1−xAs alloys. In the GaAs/AlxGa1−xAs system, transmission of the GaAs optical phonons through an AlxGa1−xAs barrier is studied using three-dimensional lattice dynamical model, fully accounting for the random arrangement of Ga and Al atoms in the alloy barrier. In the AlxGa1−xAs alloy, a localized-to-extended transition is found as a function of x. In GaAs/AlxGa1−xAs quantum wells, the transmission coefficient of the GaAs LO phonons through the alloy barrier remains significant below x < 0.3. These results are in good qualitative agreement with the experimentally deduced coherence length of LO phonons from nonequilibrium hot phonon populations." @default.
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- W1995515094 date "1996-04-01" @default.
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- W1995515094 title "Spatial and dynamical properties of optical phonons in AlxGa1−xAs and GaAs/AlxGa1−xAs superlattices: Beyond the mean field approach" @default.
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- W1995515094 doi "https://doi.org/10.1016/0921-4526(95)00853-5" @default.
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