Plasmons on the edge of MoS2 nanostructures
arXiv:1503.00538 · doi:10.1103/PhysRevB.90.161410
Abstract
Using ab initio calculations we predict the existence of one-dimensional (1D), atomically confined plasmons at the edges of a zigzag MoS2 nanoribbon. The strongest plasmon originates from a metallic edge state localized on the sulfur dimers decorating the Mo edge of the ribbon. A detailed analysis of the dielectric function reveals that the observed deviations from the ideal 1D plasmon behavior result from single-particle transitions between the metallic edge state and the valence and conduction bands of the MoS2 sheet. The Mo and S edges of the ribbon are clearly distinguishable in calculated spatially resolved electron energy loss spectrum owing to the different plasmonic properties of the two edges. The edge plasmons could potentially be utilized for tuning the photocatalytic activity of MoS2 nanoparticles.
References in corpus (6)
- Graphene plasmonics
- Dielectric function, screening, and plasmons in 2D graphene
- Theory of surface plasmons and surface-plasmon polaritons
- Dynamical polarization of graphene at finite doping
- Linear density response function in the projector-augmented wave method: Applications to solids, surfaces, and interfaces
- Ideal regularization of the Coulomb singularity in exact exchange by Wigner-Seitz truncated interactions: towards chemical accuracy in non-trivial systems