Plasmon excitation in MoS2/graphene van der waals heterostructures

We have carried out a study of collective excitations for MoS 2 / graphene van der Waals heterostructures (vdWHs) using time-dependent density function theory (TDDFT). The resonance absorption spectra of the structures were analysed to determine the polarisation direction in the X -, Y - and Z -axes...

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Bibliographic Details
Published in:Pramāṇa 2022, Vol.96 (1)
Main Authors: Liu, Dan-Dan, Zhang, Zhi-Yin, Guo, Peng, Wang, Jian-Jun
Format: Article
Language:English
Subjects:
Absorption spectra
Astronomy
Astrophysics and Astroparticles
Bilayers
Charge density
Density functional theory
Dipoles
Excitation
Graphene
Heterostructures
Molybdenum disulfide
Observations and Techniques
Physics
Physics and Astronomy
Resonance absorption
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Summary:We have carried out a study of collective excitations for MoS 2 / graphene van der Waals heterostructures (vdWHs) using time-dependent density function theory (TDDFT). The resonance absorption spectra of the structures were analysed to determine the polarisation direction in the X -, Y - and Z -axes. We found that the resonance intensities in MoS 2 / graphene structures were larger than the bilayer graphene structures in high-energy resonance, and the resonance peak of the graphene / MoS 2 / graphene heterostructure almost annihilated at the low-energy resonance band became broadened at the high-energy resonance band. We studied Fourier-induced charge density of MoS 2 / graphene structures and found that they have dipole-like characteristics in the low-energy region.
ISSN:0304-4289
0973-7111
DOI:10.1007/s12043-021-02258-y