First-principles study of Sr adsorption on InN (0001) Jianli Wang, Xiaoshan Wu, Xianqi Dai and Dongmei Bai Eur. Phys. J. B, 73 1 (2010) 75-78 Published online: 01 December 2009 DOI: 10.1140/epjb/e2009-00406-x