Thermodynamics and phase transition of topological dS black holes with a nonlinear source

Hui-Hua Zhao,Li-Chun Zhang,Fang Liu

Figure 4. Isotherms in the CP − P, β − P, κ − P diagrams of (n + 1) dimensional dS black holes with NLED of n = 3. Black dashed lines, red thick solid lines and black thin solid lines represent T < Tc, T = Tc and T > Tc, respectively.