Emergence of a nonlinear plasmon in the electronic response of doped graphene

作者：Politano Antonio^*; Chiarello Gennaro

来源：Carbon, 2014, 71: 176-180.

DOI：10.1016/j.carbon.2014.01.026

The electronic response of self-doped graphene supported on metal substrates shows two well-distinct plasmon modes: the acoustic plasmon, characterized by a linear dispersion, and a nonlinear plasmon. The nonlinear plasmon originates from the anisotropy of the electron bands of graphene around the K point. The existence of two plasmons with a different dispersion relation demonstrates that charge carriers with different group velocity may coexist within the same band in epitaxial graphene.

• 出版日期2014-5