The van der Waals (vdW) heterostructures employing graphene and hexagonal boron nitride (h-BN) have emerged as a typical system for building emergent two-dimensional devices, such as atomically thin transistors or capacitors. Herein, we study the nonlinear thermal transport in such vdW heterostructure by non-equilibrium molecular dynamics simulations. The results show that an obvious negative differential thermal resistance (NDTR) phenomenon can be observed under small temperature bias when the interlayer coupling becomes stronger. The vibrational spectra analysis manifests that the phonon filtering mechanism induced by interlayer coupling greatly hinders the interfacial thermal transport. To obtain the optimum conditions, the dependence of NDTR on the system length, lateral width, external temperature, and defect density is taken into account. Our findings extend the phonon filtering mechanism to thermal information processing.
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3 October 2022
Research Article|
October 05 2022
Interlayer coupling-induced controllable negative differential thermal resistance in graphene/h-BN van der Waals heterostructure
Special Collection:
Phononics of Graphene, Layered Materials, and Heterostructures
Xue-Kun Chen
;
Xue-Kun Chen
(Formal analysis, Investigation, Writing – original draft)
1
School of Mathematics and Physics, University of South China
, Hengyang 421001, China
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Jia-Ling Tan;
Jia-Ling Tan
(Software, Validation)
1
School of Mathematics and Physics, University of South China
, Hengyang 421001, China
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Min Pang;
Min Pang
(Software, Visualization)
1
School of Mathematics and Physics, University of South China
, Hengyang 421001, China
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Zhong-Xiang Xie
;
Zhong-Xiang Xie
a)
(Conceptualization, Supervision)
2
Department of Mathematics and Physics, Hunan Institute of Technology
, Hengyang 421002, China
a)Authors to whom correspondence should be addressed: xiezxhu@163.com; wuxingzhou@hnu.edu.cn; and lj332125065@163.com
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Wu-Xing Zhou;
Wu-Xing Zhou
a)
(Project administration, Resources, Writing – original draft)
3
School of Materials Science and Engineering & Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology
, Xiangtan 411201, China
a)Authors to whom correspondence should be addressed: xiezxhu@163.com; wuxingzhou@hnu.edu.cn; and lj332125065@163.com
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Jun Liu
Jun Liu
a)
(Data curation, Funding acquisition, Supervision)
1
School of Mathematics and Physics, University of South China
, Hengyang 421001, China
a)Authors to whom correspondence should be addressed: xiezxhu@163.com; wuxingzhou@hnu.edu.cn; and lj332125065@163.com
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a)Authors to whom correspondence should be addressed: xiezxhu@163.com; wuxingzhou@hnu.edu.cn; and lj332125065@163.com
Note: This paper is part of the APL Special Collection on Phononics of Graphene, Layered Materials, and Heterostructures.
Appl. Phys. Lett. 121, 142203 (2022)
Article history
Received:
June 17 2022
Accepted:
September 16 2022
Citation
Xue-Kun Chen, Jia-Ling Tan, Min Pang, Zhong-Xiang Xie, Wu-Xing Zhou, Jun Liu; Interlayer coupling-induced controllable negative differential thermal resistance in graphene/h-BN van der Waals heterostructure. Appl. Phys. Lett. 3 October 2022; 121 (14): 142203. https://doi.org/10.1063/5.0103901
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