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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Autori principali: Nguyen, Manh Tien, Nguyen, Van Men
Natura: Articolo
Lingua:English
Pubblicazione: Trường Đại học Đà Lạt 2024
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Accesso online:https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/256918
https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1283
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spelling oai:scholar.dlu.edu.vn:DLU123456789-2569182024-12-29T08:57:33Z 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
institution Thư viện Trường Đại học Đà Lạt
collection Thư viện số
language English
topic Coulomb drag resistivity
Double-layer graphene
Monolayer graphene
Random-phase approximation
Temperature effects
spellingShingle 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
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