Robust thermal quantum correlation and quantum phase transition of spin system on fractal lattices Yu-Liang Xu, Xin Zhang, Zhong-Qiang Liu, Xiang-Mu Kong and Ting-Qi Ren Eur. Phys. J. B, 87 6 (2014) 132 Published online: 11 June 2014 DOI: 10.1140/epjb/e2014-50033-5