Fig. 3
From: Strong two-dimensional plasmon in Li-intercalated hexagonal boron-nitride film with low damping

The plasmon pole weights (12) in Li-ML (black solid), LiB2N2-ML (red solid), Li+2hBN (green squares), Li+2hBN(LFE) (blue dots), and in doped (EF = 1eV) graphene (violet dashed). The inset shows the static hBN surface excitation propagator calculated without LFE (black solid) and with LFE (red dots)