Figure 4: Interlayer Coulombic energy transfer in MEG.
From: Electronic cooling via interlayer Coulomb coupling in multilayer epitaxial graphene
Collective cooling dynamics of the LD layers in MEG with 30 and 60 layers, calculated using equation (11) for lattice temperature TL=10 K (a) and TL=50 K (b). Both figures illustrate that the MEG hot-carrier relaxation characteristics observed in Fig. 2 are naturally described by the interlayer Coulombic energy transfer mechanism. MEG samples with more LD layers cool more slowly because Coulomb coupling to the HD layers close to the substrate decreases with increasing layer separation.
