Diffusivity-mobility ratio in ultrathin films of mercury cadmium telluride

Kamakhya Prasad Ghatak; Sankar Bhattacharyya; Manabendra Mondal

doi:10.1117/12.21709

1 October 1990 Diffusivity-mobility ratio in ultrathin films of mercury cadmium telluride

Kamakhya Prasad Ghatak, Sankar Bhattacharyya, Manabendra Mondal

Proceedings Volume 1307, Electro-Optical Materials for Switches, Coatings, Sensor Optics, and Detectors; (1990) https://doi.org/10.1117/12.21709
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

In this paper, an attempt is made for the first time to study the Einstein relstion for the diffusivity-mobility ratio of the elec' ons in mercury cadmium teliuride from the consideration of the fourth order in the effective mass theory and taking into account the interactions of the conduction, heavy-hole, light-hole and split-off bands respectively. The D increases with increasing electron concentration and decreasing film thickness in an osdilla- tory manner. The results are in cjuantitative aeement with the suggested experimental method of determining the Einstein relation in degenerate compounds having arbitrary dispersion laws. The results in accordance with various other models have also been derived for the purpose of comparison. The well-known results for relatively wide gap materials have been obtained as special cases under different limiting conditions of our generalized formalism.

Citation Download Citation

Kamakhya Prasad Ghatak, Sankar Bhattacharyya, and Manabendra Mondal "Diffusivity-mobility ratio in ultrathin films of mercury cadmium telluride", Proc. SPIE 1307, Electro-Optical Materials for Switches, Coatings, Sensor Optics, and Detectors, (1 October 1990); https://doi.org/10.1117/12.21709

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