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.
Presenters
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Dipendra Dahal
University of Houston, Texas, The Graduate Center, City University of New York
Authors
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Dipendra Dahal
University of Houston, Texas, The Graduate Center, City University of New York
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Godfrey A Gumbs
Hunter College of CUNY, Hunter college, City University of New York, Hunter College, City College of New York
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Andrii Iurov
The City College of New York, Medgar Evers College, Medgar Evers College, CUNY, Medgar Evers college and Hunter college, CUNY