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
Soggetti:	Coulomb drag resistivity Double-layer graphene Monolayer graphene Random-phase approximation Temperature effects
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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id	oai:scholar.dlu.edu.vn:DLU123456789-256918
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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
_version_	1822628061764386816

COULOMB DRAG RESISTIVITY IN DOUBLE-LAYER GRAPHENE: INHOMOGENEITY EFFECTS

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