Discrete solitons in graphene metamaterials
  We study nonlinear properties of multilayer metamaterials created by graphene sheets separated by dielectric layers. We demonstrate that such structures can support localized nonlinear modes described by the discrete nonlinear Schr\"{o}dinger equation and that its solutions are associated with stable discrete plasmon solitons. We also analyze the nonlinear surface modes in truncated graphene metamaterials being a nonlinear analog of surface Tamm states. 
Yuliy V. Bludov, Daria A. Smirnova, Yuri S. Kivshar, Nuno M. R. Peres,   Mikhail I. Vasilevskiy
cond-mat.mes-hall