期刊
CANADIAN JOURNAL OF PHYSICS
卷 96, 期 6, 页码 615-621出版社
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjp-2017-0542
关键词
graphene; plasmon; collective excitations; double-layer systems; electron gas
资金
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [103.01-2017.23]
We calculate the plasmon dispersion relation and damping rate of collective excitations in a double-layer system consisting of monolayer graphene and GaAs quantum well at zero temperature including layer-thickness and exchange-correlation effects. We use the generalized random-phase-approximation dielectric function and take into account the nonhomogeneity of the dielectric background of the system. We show that the effects of layer thickness, electron densities, and exchange-correlations are more pronounced for acoustic modes, while the optical branch depends remarkably on dielectric constants of the contacting media.
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