Ab initio study of intrinsic defects and diffusion behaviors in solid molecular hydrogens Qingqiang Sun, Yingting Ye, Tianle Yang, Li Yang, Shuming Peng, Xinggui Long, Xiaosong Zhou, Xiaotao Zu and Jincheng Du Eur. Phys. J. B, 88 12 (2015) 332 Published online: 14 December 2015 DOI: 10.1140/epjb/e2015-60749-1