Abstract
The infrared lattice-vibration spectra of ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Al}}_{x}\mathrm{As}$ mixed crystals have been studied by measuring the room-temperature reflectivity at near-normal incidence in the 200-600-${\mathrm{cm}}^{\ensuremath{-}1}$ frequency range. Two distinct reststrahlen bands with frequencies near those of pure GaAs and pure AlAs were observed over the entire composition range investigated. Each band shifts to lower frequencies and decreases in amplitude as the concentration of the corresponding compound in the alloy is decreased. An analysis of the data using the Kramers-Kronig technique and classical dispersion theory gives the transverse and longitudinal mode frequencies. The changes of these mode frequencies with composition are interpreted on the basis of the random-element isodisplacement model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
