Optical characterization of Hg1 - xZnxTe crystals grown by the travelling heater method

C. C. Wu*, D. Y. Chu, C. Y. Sun, T. R. Yang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)

摘要

Optical studies, including electrolyte electro-reflectance (EER) and FT-IR, have been used to characterize Hg1 - xZnxTe (MZT) crystals grown by the travelling heater method (THM). The results of EER spectra proved that the crystalline quality of ingots was quite good and its alloy composition was uniform within a grain. The temperature dependence of the energy band gap of the crystals was determined from the FT-IR experiments. The values of d(Eg) dT could be considered to be constant for various alloy compositions, and the relation between them can be fitted by an analytical expression: d(Eg) dT = (5.948 - 16.53x + 5.211x2) × 10-4 eV K-1. However, the Eg values may not be a true linear function of temperature. The deviations from linearity were too small to be unambiguously included in the above expression, except for the critical point, x = 0.392, at which d(Eg) dT = 0 only at higher temperatures and definitely revealed positive values of ≈10-5 eV K-1 below 60 K.

原文英語
頁(從 - 到)7-12
頁數6
期刊Materials Chemistry & Physics
40
發行號1
DOIs
出版狀態已發佈 - 1995 二月

ASJC Scopus subject areas

  • 材料科學(全部)
  • 凝聚態物理學

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