“School of Physic”
Back to Papers HomeBack to Papers of School of Physic
Paper IPM / Physic / 14685 |
|
||||
Abstract: | |||||
We explore the collective electronic excitations of bilayer molybdenum disulfide (MoS2) using the density functional theory together with the random phase approximation. The many-body dielectric function and electron energy-loss spectra are calculated
using an ab initio based model involving material-realistic physical properties. The electron energy-loss function of bilayer MoS2 system is found to be sensitive to either electron or hole doping and it is owing to the fact that the Kohn-Sham band dispersions are not symmetric for energies above and below the zero Fermi level. For small momentum transfer, the plasmon dispersion exhibits √q dispersion as the conventional plasmon of a two-dimensional electron gas originating from low-energy electron scattering.
Download TeX format |
|||||
back to top |