Figure 2
From: Possible Electric-Field-Induced Superconducting States in Doped Silicene

Static susceptibility and the dominant spin fluctuations.
The k-space distributions of the zero temperature static susceptibility for Δ = 1 eV and different dopings: (a) x = 0, (b) x = 0.1 and (c) x = 0.25. (d) A typical pattern of the dominant spin fluctuations for x = 0.1 and Δ = 1 eV.