Y. Gui, G. Zheng, X. C. Zhang, Shaoling Guo, J. Chu, Yi Cai
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Relationship between resistivity and temperature for Hg1-xCdxTe photoconductive detectors
Two kinds of two dimensional electrons in same surface have been found in Hg1-xCdxTe (x equals 0.214) photoconductive detectors from studies of the shubnikov-de Haas (SdH) oscillation. It has been found that the number of electrons in each kind is about constant from 1.5 K to 55 K by SdH measurements. A model considered two kinds of surface electrons is proposed to fit the temperature dependence of the resistivity. The electrical parameters obtained by this model agree well with the experiment and the results given by SdH measurements. This paper offers a simple and effective model to investigate the bulk and surface electrical properties for a two-terminal device.
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