COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS
We investigate Coulomb drag resistivity in a double-layer system consisting of two parallel monolayer graphene sheets. In calculations, we employ the random-phase approximation to determine the polarizability functions of the graphene layers and the frequency-dependent dielectric function of the str...
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Trường Đại học Đà Lạt
2024
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/256918 https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1283 |
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oai:scholar.dlu.edu.vn:DLU123456789-2569182024-12-29T01:13:07Z COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS Nguyen, Manh Tien Nguyen, Van Men Coulomb drag resistivity Double-layer graphene Monolayer graphene Random-phase approximation Temperature effects We investigate Coulomb drag resistivity in a double-layer system consisting of two parallel monolayer graphene sheets. In calculations, we employ the random-phase approximation to determine the polarizability functions of the graphene layers and the frequency-dependent dielectric function of the structure, taking into account inhomogeneity effects of the background dielectric. Our numerical calculations reveal that Coulomb drag resistivity in double-layer graphene systems steadily increases with increasing temperature but quickly decreases as the interlayer separation increases. The drag resistivity between the two layers in the case of an inhomogeneous background dielectric is substantially larger than that in the case of a homogeneous one. In addition, both the value and the imbalance in carrier density in the layers lead to noticeable changes in Coulomb drag resistivity in the system. Our study results are useful in graphene-based structure applications. 2024-12-29T00:39:24Z 2024-12-29T00:39:24Z 2024 Article 0866-787X https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/256918 https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1283 10.37569/DalatUniversity.14.3S.1283(2024) en Dalat University Journal of Science, Volume 14, Issue 3S; p.51-60 application/pdf Trường Đại học Đà Lạt |
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Thư viện Trường Đại học Đà Lạt |
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| language |
English |
| topic |
Coulomb drag resistivity Double-layer graphene Monolayer graphene Random-phase approximation Temperature effects |
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Coulomb drag resistivity Double-layer graphene Monolayer graphene Random-phase approximation Temperature effects Nguyen, Manh Tien Nguyen, Van Men COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS |
| description |
We investigate Coulomb drag resistivity in a double-layer system consisting of two parallel monolayer graphene sheets. In calculations, we employ the random-phase approximation to determine the polarizability functions of the graphene layers and the frequency-dependent dielectric function of the structure, taking into account inhomogeneity effects of the background dielectric. Our numerical calculations reveal that Coulomb drag resistivity in double-layer graphene systems steadily increases with increasing temperature but quickly decreases as the interlayer separation increases. The drag resistivity between the two layers in the case of an inhomogeneous background dielectric is substantially larger than that in the case of a homogeneous one. In addition, both the value and the imbalance in carrier density in the layers lead to noticeable changes in Coulomb drag resistivity in the system. Our study results are useful in graphene-based structure applications. |
| format |
Article |
| author |
Nguyen, Manh Tien Nguyen, Van Men |
| author_facet |
Nguyen, Manh Tien Nguyen, Van Men |
| author_sort |
Nguyen, Manh Tien |
| title |
COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS |
| title_short |
COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS |
| title_full |
COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS |
| title_fullStr |
COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS |
| title_full_unstemmed |
COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS |
| title_sort |
coulomb drag resistivity in double-layer graphene: inhomogeneity effects |
| publisher |
Trường Đại học Đà Lạt |
| publishDate |
2024 |
| url |
https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/256918 https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1283 |
| _version_ |
1819765606415597568 |