[1] Hu H, Zhu J L, Li D J, et al. Phys. Rev. B, 2001, 63: 195307.

[2] Romer R A, Raikh M E. Phys. Rev. B, 2001, 62(11): 7045.

[3] Jakyoung S, Sergio E U. Phys. Rev. B, 2001, 63: 125302.

[4] Halonen V, Chakraborty T, Pietilainen T. Phys. Rev. B, 1992, 45(11): 5980.

[5] Barticevic Z, Pacheco M, Duque C A, et al. Phys. Rev. B, 2003, 68: 073312.

[7] Hui P. Chin. Phys., 2000, 9(11): 844.

[8] Narvaez G A, Hawrylak P, Brum J A. Physica E, 2001, 9: 716.

[9] Maslov A V, Citrin D S. Phys. Rev. B, 2003, 67: 121304.

[10] Yan J Y. Chin .Phys. B, 2008, 17(12): 4640.

[11] Dias da Sillva L G G V, Ulloa S E, Grovorov A O. Phys. Rev. B, 2004, 70: 155318.

[13] Korkusinski M, Hawrylak P, Bayer M. Phys. Stat. Sol. B, 2002, 234(1): 273.

[14] Bayer M, Korkusinski M, Hawrylak P, et al. Phys. Rev. Lett., 2003, 90(18): 186801.

[15] Mainz Z, Mikhailo S A, Wensauer A, et al. Physica E, 2002, 12: 888.

[16] Wu H, Bao C G. Chin. Phys., 2006, 15(9): 2102.

[17] Wu H. Chin. Phys. B, 2008, 17(8): 3026.