Epitaxic Sublimation Methods for the Study of Pseudo-Binary Semiconductor Alloys
Progress rept. 1 Jun 1971-31 May 1972
PENNSYLVANIA UNIV PHILADELPHIA LAB FOR RESEARCH ON THE STRUCTURE OF MATTER
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The parting layer and the hot wall techniques of epitaxic film growth have been extensively and successfully tested and are now in operation. The research on the PbOxS1-x has been extended to phtotconductivity measurements. Use of modulation spectroscopy techniques for the study of the optical properties of the films was initiated and extensive thermoreflectance measurements were carried out on the IV-VI compounds and the resulting structures were identified with the critical points in their energy band structure. The surface wave studies have progressed with generation of 200 MHz Rayleigh waves using transducers of aluminum interdigital arrays on quartz. The experimental system for the physiochemical studies of PbS-PbO system was completed and a large number of kinetic studies were carried out. A full- relativistic APW program based on the Diracs equation has been developed and successfully tested on SnTe. The calculation of the deformation potential for the extrema of the lead chalcogenides and SnTe was completed.
- Solid State Physics