Critical behaviors of a (2 + 1)-dimensional black hole with a nonlinear electrodynamics source

Li-Hua Wang,Yun He,Meng-Sen Ma

Figure 3. Behaviors of T − S. In the left panel, we fix q = 0.2, P = 0.01 and take different values of a. From top to bottom, a = 1, a = ac = 0.889, a = 0.7. In the right panel, we set a = 0.5, P = 0.01 and take q = 0.1, q = qc = 0.136, q = 0.18 from top to the bottom. In both figures, the black point denotes the position of the critical point.