Phase transitions in four-dimensional AdS black holes with a nonlinear electrodynamics source
Ramón Bécar,P A González,Joel Saavedra,Yerko Vásquez,Bin Wang
Figure 8. Gibbs free energy for nonlinear Maxwell electrodynamics for $p=\tfrac{3}{4}$, k = 1, η = 0.1 for different values of the electric potential Φ in the grand canonical ensemble.