Out-of-Plane Dielectric Susceptibility of Graphene in Twistronic and Bernal Bilayers

We describe how the out-of-plane dielectric polarizability of monolayer graphene influences electrostatics bilayer graphene—both Bernal (BLG) and twisted (tBLG). compare value computed using density functional theory with output from previously published experimental data on electrostatically controlled interlayer asymmetry potential in BLG on-layer distribution tBLG. show that monolayers tBLG are described well by αexp = 10.8 Å3 effective susceptibility ϵz 2.5, including their electron at zero magnetic field Landau level pinning quantizing fields.