Abstract
Littlewood's assumption in the calculation of the transverse effective charge (TEC) of IV-VI compound semiconductors is studied by the simple calculation at W -point on the Jones zone surfaces based on the Heine-Jones model. It is shown that the main peak of optical absorption spectrum cannot be assigned only to (111) component of the effective charge in contrast with Littlewood's assumption. The TEC is directly calculated by executing the band calculation with the potential obtained by the EPM in the framework of Vogl's expression. The calculated result gives better agreement with experiment than Littlewood's. The acoustic sum rule is also studied by using the similar formulation given by Vogl.
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.
