Plasmon damping rates in Coulomb coupled 2D layers in a heterostructure.
POSTER
Abstract
Coulomb excitations due to charge density oscillation are calculated for a double layer
heterostructure. Specifically, we consider two-dimensional (2D) layers of silicene and graphene
on a substrate. The essential ingredient in our calculations is the obtained surface response
function which we employ to calculate the plasmon dispersion relations as well as the decay rate due
to Landau damping. The Coulomb coupling between layers renormalizes the plasmon frequency on a
single layer. Additionally, the single-particle excitations from both layers can contribute to the damping
rates of the plasmon modes.
heterostructure. Specifically, we consider two-dimensional (2D) layers of silicene and graphene
on a substrate. The essential ingredient in our calculations is the obtained surface response
function which we employ to calculate the plasmon dispersion relations as well as the decay rate due
to Landau damping. The Coulomb coupling between layers renormalizes the plasmon frequency on a
single layer. Additionally, the single-particle excitations from both layers can contribute to the damping
rates of the plasmon modes.
*GG acknowledges the support from the US AFRL Grant # FA9453-21-1-0046.
Presenters
-
Dipendra Dahal
- University of Houston, Texas
- The Graduate Center, City University of New York