Substrate effect on screening potential in doped graphene using linear Thomas-Fermi approximation

We investigate the effect of the substrate on the electrostatic screening potential in a dopedgraphene monolayer. We use the linear Thomas-Fermi theory and calculate the real space screeningpotential in both suspended and supported graphene layers. Our results show that by supporting graphene onan insulating substrate, the screening potential decreases and this effect becomes stronger by using a higherdielectric constant substrate. Also, we find that the effect of substrate is slightly more pronounced at lowerdoping levels.

کلیدواژه ها:

Screening potential ، Linear Thomas-Fermi ، Substrate ، Graphene