Phase transitions of the five-state clock model on the square lattice*

Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 531107040857), the Natural Science Foundation of Hunan Province, China (Grant No. 851204035), and the National Natural Science Foundation of China (Grant No. 11774420).

Chen Yong1, Xie Zhi-Yuan2, Yu Ji-Feng1, †
       

(color online) Magnetization with existence of weak external magnetic fields, and the corresponding magnetic susceptibility as defined in Eq. (7) with D = 40.