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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2009-07-01

发表刊物：SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES

收录刊物：EI、SCIE

卷号：52

期号：7

页面范围：1928-1932

ISSN号：1006-9321

关键字：first-principles calculations; optical property; dielectric function; absorption coefficient

摘要：The structural and optical properties of amorphous semiconductor mercury cadmium telluride (a-MCT) are obtained by the first principles calculations. The total pair distribution functions and the density of states show that the a-MCT has the semiconductor characteristic. The calculated results of dielectric function show that E (2) peak of the imaginary of dielectric function for the crystal mercury cadmium telluride abruptly disappears in the amorphous case due to the long-range disorders. And the imaginary of dielectric function of a-MCT shows a large broad peak, which is in agreement with the available results of other amorphous semiconductors. From the linear extrapolation of the curve A omega E > (2)(omega)(1/2) versus A omega, it can be obtained that the optical energy gap of amorphous semiconductor Hg(0.5)Cd(0.5)Te is 0.51 +/- 0.05 eV.