A density functional study of small sized silver-doped silicon clusters: Ag2Sin (n = 1–13) Cai Yang, Song Hao Jia, Mao Fen Ma, Shuai Zhang, Cheng Lu and Gen Quan Li Eur. Phys. J. D, 69 11 (2015) 244 Published online: 05 November 2015 DOI: 10.1140/epjd/e2015-60404-1