Quantum Monte Carlo study of the S4 symmetric microscopic model for iron-based superconductors Guangkun Liu, Zhong-Bing Huang and Yong-Jun Wang Eur. Phys. J. B, 92 2 (2019) 42 Published online: 18 February 2019 DOI: 10.1140/epjb/e2019-90472-8