[1] Weyers M, Sato M and Ando H 1992 Jpn. J. Appl. Phys.
I$\!$I 31 L853

[2]Wei S H and Zunger A 1996 Phys. Rev. Lett. 76
664

[3]Perkins J D, Mascarenhas A, Zhang Y, Geisz J F, Friedman D
J, Olson J M and Kurtz S R 1999 Phys. Rev. Lett. 82 3312

[4]Zhang Y, Mascarenhas A, Xin H P and Tu C W 2000 Phys.
Rev. B 61 7479

[5] Ma B S, Su F H, Ding K, Li G H, Zhang Y, Mascarenhas A,
Xin H P and Tu C W 2005 Phys. Rev. B 71 045213

[6]Berti M, Bisognin G, Salvador D D, Napolitani E and
Vangelista S 2007 Phys. Rev. B 76 205323

[7] Bosa I, McPeake D and Fahy S 2008 Phys. Rev. B
78 245206

[8]Jin Z, Su Y B, Cheng W, Liu X Y, Xu A H and Qi M 2008
Chin. Phys. Lett. 25 3075

[9]Shan W, Walukiewicz W, Ager J W, Haller E E, Geisz J F,
Friedman D J, Olson J M and Kurtz S R 1999 Phys. Rev. Lett.
82 1221

[10] Kent P R C and Zunger A 2001 Phys. Rev. B 64
115208

[11] Varshni Y P 1967 Physica 34 149

[12] Liang X G, Jiang D S, Bian L F, Zhong P, Li L H and Wu R
H 2002 Chin. Phys. Lett. 19 1203

[13] Bian L F, Jiang D S, Liang X G and Lu S L 2004 Chin.
Phys. Lett. 21 548

[14] Kudrawiec R, Sek G, Misiewicz J, Li L H and Harmand J C
2004 Eur. Phys. J. Appl. Phys. 27 313

[15] Kudrawiec R, Motyka M, Misiewicz J, Yuen H B, Bank S R,
Wistey M A, Bae H P and Harris J S 2005 J. Appl. Phys.
98 063527

[16] Tsang M S, Wang J N, Ge W K, Li G H, Fang Z L, Chen Y,
Han H X, Li L H and Pan Z 2001 Appl. Phys. Lett. 78 3595

[17] Li G H, Goni A R, Abraham C, Syassen K, Santos P V,
Cantarero A, Brabdt O and Ploog K 1994 Phys. Rev. B 50
1575

[18] Weinstein B A, Stambach S R, Ritter T M, Maclean J O and
Wallis D J 2003 Phys. Rev. B 68 035336

[19] Eremets M I, Krasnovskij O A, Struzhkin V V and Shirokov
A M 1989 Semicond. Sci. Technol. 4 267

[20] Mattila T, Wei S H and Zunger A 1999 Phys. Rev. B
60 R11245