▎ 摘　　要

We study the phonon-mediated superconductivity in light doped ABA-stacked trilayer graphene system by means of two theoretical models. We find superconducting transition temperature T-C can be greatly enlarged by tuning the Fermi energy away from neutral point. Utilizing realistic parameters, we find T-c is approximately 1 K even under weak doping condition E-F = 0.1 eV. Specifically, we give out the analytical expression for superconductivity gap Delta and superconducting transition temperature T-c for negative-U Hubbard model. Further, we consider the thermal fluctuation and calculate the Berezinskii-Kosterlitz-Thouless critical temperature T-BKT. Besides, we consider a two-band BCS model in comparision with the negative-U Hubbard model. The results for both models are qualitatively consistent. Our study provides a promising possibility for realizing intrinsic superconductivity in multilayer graphene systems. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4773226]