  The ab initio anisotropic Migdal-Eliashberg formalism has been used to
examine the pairing mechanism and the nature of the superconducting gap in the
recently discovered lithium-decorated monolayer graphene superconductor. Our
results provide evidence that the superconducting transition in Li-decorated
monolayer graphene can be explained within a standard phonon-mediated
mechanism. We predict a single anisotropic superconducting gap and a critical
temperature Tc = 5.1-7.6 K, in very good agreement with the experimental
results.
