First-principle study of the electronic structures and ferroelectric properties in BaZnF4 D. Cao, M.-Q. Cai, C.-H. Tang, P. Yu, W.-Y. Hu, Y. Du, B.-Y. Huang and H.-Q. Deng Eur. Phys. J. B, 74 4 (2010) 447-450 Published online: 30 March 2010 DOI: 10.1140/epjb/e2010-00105-7