First principle calculations of thermodynamic properties of pure graphene sheet and graphene sheets with Si, Ge, Fe, and Co impurities
Kheyri A1, Nourbakhsh Z2, †,
       

The heat capacities at constant volume (CV) and constant pressure (CP) as a function of pressure at different temperatures for (a) pure graphene, (b) Si–graphene, (c) Ge–graphene, (d) Fe–graphene and (e) Co–graphene sheets. The black lines are for 3.1% impurity density and the blue ones are for 12.5%.