Energy-loss function for monolayer phosphorene

被引:0
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作者
Hieu T. Nguyen-Truong
机构
[1] Ton Duc Thang University,Theoretical Physics Research Group, Advanced Institute of Materials Science
[2] Ton Duc Thang University,Faculty of Applied Sciences
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关键词
Phosphate Monolayers; Energy-loss Function (ELF); Finite Momentum Transfer; Adiabatic Local Density Approximation (ALDA); Plasmon Peak;
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摘要
We calculate the energy-loss function for monolayer phosphorene in the framework of time-dependent density functional theory. The calculations are performed in the adiabatic local density approximation with local field effects. We study the origin of the features in the absorption spectra and the energy dispersion of the features in the excitation spectra. The energy dispersions show a strong directional dependence. At vanishing momentum transfer, the excitation spectra are dominated by a plasmon peak at 10.5 eV. At finite momentum transfer, the plasmon dispersion can be described by the layer electron gas model.
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页码:15541 / 15548
页数:7
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