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基于第一性原理赝势平面波方法对伽马晶体CuCl, CuBr, CuI的体模量、体模量对压强的一阶偏导 数、电子结构、折射率等光学性质进行了计算.计算结果表明,广义梯度近似(GGA)下CuX(X = Cl, Br, I) 晶体的晶格常数与体模量的计算值与实验相差较小.与局域密度近似(LDA)相比, GGA更适合于 CuX(X = Cl, Br, I)晶体 的计算.这三者的价带都来源于Cu的3d态,导带部分主要来自Cu和卤素的s电子贡献,很少部分来自卤素的p电子 贡献.计算得到CuCl, CuBr, CuI的折射率分别为1.887, 2.015, 2.199,与应用Gladstone-Dale半经验关系得到 的结果符合得很好.
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关键词:
- 电子结构 /
- 光学性质 /
- 第一性原理计算 /
- CuX (X = Cl,Br,I)
We use first-principles calculation with pseudo-potential and plane wave method to study the bulk meduli, electronic structures and optical properties of copper halides CuX (X = Cl, Br, I). A comparison of the calculation results with the available experimental results show that it is more suitable using the generalized gradient approximation to study these properties than using the local density approximation. The results show that valence bands of CuXX(X = Cl, Br, I) are dominated by the d bands of Cu. Conduction bands are mainly from s bands of Cu and halide atoms, as well as from p bands of halide atoms. The calculated refractive indices of CuX(X = Cl, Br, I) are 1.887, 2.015, and 2.199, respectively. These results are in good agreement with the those calculated from the Gladstone-Dale relationship.-
Keywords:
- electronic structure /
- optical properties /
- first-principles calculation /
- CuX(X = Cl,Br,I)
[1] Ves S, Glotzel D, Cardona M, Overhof H 1981 Phys. Rev. B 24 3073
[2] Gross J G, Lewonczuk S, Khan M A, Rengeissen J 1980 Solid State Commun. 36 907
[3] Lewonczuk S, Ringeissen J 1994 Phys. Rev. B 49 2344
[4] Cardona M 1963 Phys. Rev. 129 69
[5] Derenzo S E, Moses W W 1992 Proceedings of the Crystal 2000 International Workgroup on Heavy Scintillators for Scientific and Industrial Applications Chamonix, France, Sept 22-26, 1992 p125
[6] Amrani B, Benmessabih T, Tahiri M, Chiboub I, Hiadsi S, Hamdache F 2006 Physica B 381 179
[7] Gonze X, Beuken J, Caracas R, Detraux F, Fuchs M, Rignanese G, Sindic L, Verstraete M, Zerah G, Jollet F 2002 Comput. Mater. Sci. 25 478
[8] Perdew J P, Burke K, Ernzerhof M 1996 Phys. Rev. Lett. 77 3865
[9] Kohn W, Sham L J 1965 Phys. Rev. 140 1133
[10] Zhang Y K, Yang W T 1998 Phys. Rev. Lett. 80 890
[11] Hammer B, Hansen L B, Norskov J K 1999 Phys. Rev. B 59 7413
[12] Fuchs M, Scheffler M 1999 Comput. Phys. Commun. 119 67
[13] Press W H, Flannery B P, Teukolsky S A, Vetterling W T 1986 Numerical Recipes, the Art of Scientific Computing (Cambridge: Cambridge University Press)p308
[14] Hull S, Keen D A 1994 Phys. Rev. B 50 5868
[15] Hanson R C, Hallberg J R, Schwab C 1972 Appl. Phys. Lett. 21 490
[16] Hoffman M, Hull S, Keen D A 1995 Phys. Rev. B 51 12022
[17] Weber M J 2004 Nucl. Instrum. Methods Phys. Res. Sect. A 527 9
[18] Zhang J H, Ding J W, Lu Z H 2009 Acta Phys. Sin. 58 1901 (in Chinese)[张计划, 丁建文, 卢章辉 2009 58 1901]
[19] Karazhanov S Z, Ravindran P, Kjekshus A, Fjellvag H, Svensson B G 2007 Phys. Rev. B 75 155104
[20] Mandarino J A 1976 Can. Mineral. 14 498
[21] Mandarino J A 1979 Can. Mineral. 17 71
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[1] Ves S, Glotzel D, Cardona M, Overhof H 1981 Phys. Rev. B 24 3073
[2] Gross J G, Lewonczuk S, Khan M A, Rengeissen J 1980 Solid State Commun. 36 907
[3] Lewonczuk S, Ringeissen J 1994 Phys. Rev. B 49 2344
[4] Cardona M 1963 Phys. Rev. 129 69
[5] Derenzo S E, Moses W W 1992 Proceedings of the Crystal 2000 International Workgroup on Heavy Scintillators for Scientific and Industrial Applications Chamonix, France, Sept 22-26, 1992 p125
[6] Amrani B, Benmessabih T, Tahiri M, Chiboub I, Hiadsi S, Hamdache F 2006 Physica B 381 179
[7] Gonze X, Beuken J, Caracas R, Detraux F, Fuchs M, Rignanese G, Sindic L, Verstraete M, Zerah G, Jollet F 2002 Comput. Mater. Sci. 25 478
[8] Perdew J P, Burke K, Ernzerhof M 1996 Phys. Rev. Lett. 77 3865
[9] Kohn W, Sham L J 1965 Phys. Rev. 140 1133
[10] Zhang Y K, Yang W T 1998 Phys. Rev. Lett. 80 890
[11] Hammer B, Hansen L B, Norskov J K 1999 Phys. Rev. B 59 7413
[12] Fuchs M, Scheffler M 1999 Comput. Phys. Commun. 119 67
[13] Press W H, Flannery B P, Teukolsky S A, Vetterling W T 1986 Numerical Recipes, the Art of Scientific Computing (Cambridge: Cambridge University Press)p308
[14] Hull S, Keen D A 1994 Phys. Rev. B 50 5868
[15] Hanson R C, Hallberg J R, Schwab C 1972 Appl. Phys. Lett. 21 490
[16] Hoffman M, Hull S, Keen D A 1995 Phys. Rev. B 51 12022
[17] Weber M J 2004 Nucl. Instrum. Methods Phys. Res. Sect. A 527 9
[18] Zhang J H, Ding J W, Lu Z H 2009 Acta Phys. Sin. 58 1901 (in Chinese)[张计划, 丁建文, 卢章辉 2009 58 1901]
[19] Karazhanov S Z, Ravindran P, Kjekshus A, Fjellvag H, Svensson B G 2007 Phys. Rev. B 75 155104
[20] Mandarino J A 1976 Can. Mineral. 14 498
[21] Mandarino J A 1979 Can. Mineral. 17 71
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