Superconductivity and phase diagram in Ru-doped SrFe2−xRuxAs2 single crystals Yanpeng Qi, Zhaoshun Gao, Lei Wang, Dongliang Wang, Xianping Zhang, Chao Yao, Chunlei Wang, Chengduo Wang and Yanwei Ma EPL, 97 1 (2012) 17008 Published online: 03 January 2012 DOI: 10.1209/0295-5075/97/17008