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Proceedings Paper

Diffusivity-mobility ratio in ultrathin films of mercury cadmium telluride
Author(s): Kamakhya Prasad Ghatak; Sankar Bhattacharyya; Manabendra Mondal
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Paper 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.

Paper Details

Date Published: 1 October 1990
PDF: 14 pages
Proc. SPIE 1307, Electro-Optical Materials for Switches, Coatings, Sensor Optics, and Detectors, (1 October 1990);
Show Author Affiliations
Kamakhya Prasad Ghatak, Univ. of Jadavpur (India)
Sankar Bhattacharyya, Consulting Engineering Service (India)
Manabendra Mondal, Y. S. Palpara College (India)

Published in SPIE Proceedings Vol. 1307:
Electro-Optical Materials for Switches, Coatings, Sensor Optics, and Detectors
Rudolf Hartmann; M. J. Soileau; Vijay K. Varadan, Editor(s)

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