ABSTRACT
We study the dependence of the plasmon dispersion relation of graphene on applied uniaxial strain. Besides electron correlation at the random-phase approximation level, we also include local eld effects specic for the honeycomb lattice. As a consequence of the two-band character of the electronic band structure, we nd two distinct plasmon branches. We recover the square-root behavior of the low-energy branch, and nd a nonmonotonic dependence of the strain-induced modication of its stiffness, as a function of the wave-vector orientation with respect to applied strain. We also take into account the full three-dimensional representation for the wave functions of single-particle excitations. This induces quantitative changes in the plasmon dispersion relation.
