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 electron charge density of (a) pure graphene, (b) Si–graphene, (c) Ge–graphene, (d) Fe–graphene, and (e) Co–graphene sheets in the [001] plane for two different pressures of 7 GPa (right) and 0 GPa (left).
