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      Acoustic plasmons in extrinsic free-standing graphene 

      Pisarra, M.; Sindona, A.; Riccardi, P.; Silkin, Viatcheslav M.; Pitarke de la Torre, José María ORCID (IOP Publishing, 2014-08-04)
      An acoustic plasmon is predicted to occur, in addition to the conventional two-dimensional (2D) plasmon, as the collective motion of a system of two types of electronic carriers coexisting in the same 2D band of extrinsic ...