Research Article

Geometrical Method for Thermal Instability of Nonlinearly Charged BTZ Black Holes

Figure 2

Ruppeiner Ricci scalar (solid line), heat capacity (dotted line), and temperature (dashed line) versus for . HNED model (up-left panel) and SNED model (up-right panel): , . CNED model (down-left panel) and CNED model (down-right panel): , (different scales).