First-principles investigation of electronic and optical properties in wurtzite Zn1-xMgxO X. D. Zhang, M. L. Guo, C. L. Liu, L. A. Zhang, W. Y. Zhang, Y. Q. Ding, Q. Wu and X. Feng Eur. Phys. J. B, 62 4 (2008) 417-421 Published online: 16 May 2008 DOI: 10.1140/epjb/e2008-00186-9