Dr Paul Kinsler. [Acknowledgements & Feedback]
This is part of a hyperlinked notes maze -- please read the index-file for important information about the nature and reliability of this document.
Ridley-1993 uses rigid boundary-conditions, and so while the hybrid-phonons have an IP-phonon component, they are still basically guided-phonons. In contrast, it mentions in a 'note added in proof' that in ionic slabs with stress free surfaces the phonon modes are only weakly hybridised (I think this refers to Ridley-ACB-1994), and so there are FK-phonon (IP-phonon) -like interface modes.
Strictly speaking, the model needs six boundary-conditions to work properly, but only four are understood -- these are the EM and displacement conditions (see TFM-model). "Optical stress" is used in Ridley-ACB-1994, and referred to also in Babiker-Z-1998.
There is mention (somewhere) that the force constants in AlAs are much greater than in GaAs, which (I think) would imply that 'rigid boundary-conditions' could be appropriate at an AlAs/GaAs interface, this might then give a reduction in the scattering rate due to the reduce number of phonon modes... but why the 'sum-rule' of Mori-A-1989 (and Register-1992) would be invalid I'm not sure.
Educato-LBVJ-1993 do not hybridise their phonons, and calculate scattering rates using the DC-model.
XINDEX: log-file, boundary-condition, Ridley-ACB-1994, Ridley-1993, Register-1992, HD-model, Educato-LBVJ-1993, DC-model, Babiker-Z-1998, index-file, log-file.
19971127 1212 19980107 23
Email Feedback: Dr.Paul.Kinsler@physics.org
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