中国物理B ›› 2010, Vol. 19 ›› Issue (3): 37102-037102.doi: 10.1088/1674-1056/19/3/037102

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Electronic structure and optical properties of the red and yellow mercuric iodides

徐斌, 吕健   

  1. Department of Mathematics and Information Sciences, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China
  • 收稿日期:2009-04-24 修回日期:2009-09-15 出版日期:2010-03-15 发布日期:2010-03-15
  • 基金资助:
    Project supported by Program for Science and Technology Innovation Talents in Universities of Henan Province, China (Grant No.~2008HASTIT008), the National Natural Science Foundation of China (Grant No.~10574039) and the Key Project Foundation of Science and Technology of He'nan Province, China (Grant No.~092102210166).

Electronic structure and optical properties of the red and yellow mercuric iodides

Xu Bin(徐斌) and Lv Jian(吕健)   

  1. Department of Mathematics and Information Sciences, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China
  • Received:2009-04-24 Revised:2009-09-15 Online:2010-03-15 Published:2010-03-15
  • Supported by:
    Project supported by Program for Science and Technology Innovation Talents in Universities of Henan Province, China (Grant No.~2008HASTIT008), the National Natural Science Foundation of China (Grant No.~10574039) and the Key Project Foundation of Science and Technology of He'nan Province, China (Grant No.~092102210166).

摘要: With the help of the ab initio full-potential linearized augmented plane wave (FPLAPW) method, calculations of the electronic structure and linear optical properties are carried out for red HgI2 and yellow HgI2. It is found that the red HgI2 has a direct gap of 1.22834 eV and the yellow HgI2 has an indirect gap of 2.11222 eV. For the red HgI2, the calculated optical spectra are qualitatively in agreement with the experimental data. Furthermore, the origins of the different peaks of ε 2 (ω ) are discussed. Our calculated anisotropic dielectric function of the red HgI2 is a nice match with the experimental results. Our calculated results are able to reproduce the overall trend of the experimental reflectivity spectra. Although no comparable experimental and theoretical results are available, clearly, the above proves the reliability of our calculations, suggesting that our calculations should be convincing for the yellow HgI2. Finally, the different optical properties are discussed.

Abstract: With the help of the ab initio full-potential linearized augmented plane wave (FPLAPW) method, calculations of the electronic structure and linear optical properties are carried out for red HgI2 and yellow HgI2. It is found that the red HgI2 has a direct gap of 1.22834 eV and the yellow HgI2 has an indirect gap of 2.11222 eV. For the red HgI2, the calculated optical spectra are qualitatively in agreement with the experimental data. Furthermore, the origins of the different peaks of $\varepsilon_2(\omega)$ are discussed. Our calculated anisotropic dielectric function of the red HgI2 is a nice match with the experimental results. Our calculated results are able to reproduce the overall trend of the experimental reflectivity spectra. Although no comparable experimental and theoretical results are available, clearly, the above proves the reliability of our calculations, suggesting that our calculations should be convincing for the yellow HgI2. Finally, the different optical properties are discussed.

Key words: ab initio, electronic band structure, optical properties, semiconductor

中图分类号:  (Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.))

  • 71.15.Ap
71.20.Nr (Semiconductor compounds) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 78.40.Fy (Semiconductors)