We present first-principles calculations on systems consisting of a few layers of graphene and lithium. In particular, we investigate the evolution of the electron-phonon coupling strength with increasing number of layers. We find that, for intercalated systems such as C6-Li-C6 or C6-Li-C6-Li-C6, the electron-phonon coupling is weak. However, for systems of equal number of graphene and lithium layers, such as C6-Li or C6-Li-C6-Li, the electron-phonon coupling is strong. We investigate the optimal configuration that yields the highest superconducting transition temperature.
@article{arxiv.1310.3813,
title = {Superconductivity in Graphene-Lithium},
author = {D. M. Guzman and H. M. Alyahyaei and R. A. Jishi},
journal= {arXiv preprint arXiv:1310.3813},
year = {2013}
}