We study the interfacial thermal conductance of grain boundaries (GBs) between monolayer graphene and hexagonal boron nitride (h-BN) sheets using a combined atomistic approach. First, realistic samples containing graphene/h-BN GBs with different tilt angles are generated using the phase-field crystal model developed recently [P. Hirvonen et al., Phys. Rev. B 100, 165412 (2019)] that captures slow diffusive relaxation inaccessible to molecular dynamics (MD) simulations. Then, large-scale MD simulations using the efficient GPUMD package are performed to assess heat transport and rectification properties across the GBs. We find that lattice mismatch between the graphene and h-BN sheets plays a less important role in determining the interfacial thermal conductance as compared to the tilt angle. In addition, we find no significant thermal rectification effects for these GBs.
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21 December 2021
Research Article|
December 15 2021
Heat transport across graphene/hexagonal-BN tilted grain boundaries from phase-field crystal model and molecular dynamics simulations
Special Collection:
Engineering and Understanding of Thermal Conduction Materials
Haikuan Dong
;
Haikuan Dong
1
Beijing Advanced Innovation Center for Materials Genome Engineering, Corrosion and Protection Center, University of Science and Technology Beijing
, Beijing 100083, China
2
MSP Group, QTF Centre of Excellence, Department of Applied Physics, Aalto University
, FI-00076 Aalto, Finland
3
College of Physical Science and Technology, Bohai University
, Jinzhou 121013, China
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Petri Hirvonen
;
Petri Hirvonen
2
MSP Group, QTF Centre of Excellence, Department of Applied Physics, Aalto University
, FI-00076 Aalto, Finland
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Zheyong Fan
;
Zheyong Fan
a)
2
MSP Group, QTF Centre of Excellence, Department of Applied Physics, Aalto University
, FI-00076 Aalto, Finland
3
College of Physical Science and Technology, Bohai University
, Jinzhou 121013, China
a)Author to whom correspondence should be addressed: brucenju@gmail.com
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Ping Qian;
Ping Qian
b)
4
Beijing Advanced Innovation Center for Materials Genome Engineering, Department of Physics, University of Science and Technology Beijing
, Beijing 100083, China
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Yanjing Su;
Yanjing Su
c)
1
Beijing Advanced Innovation Center for Materials Genome Engineering, Corrosion and Protection Center, University of Science and Technology Beijing
, Beijing 100083, China
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Tapio Ala-Nissila
Tapio Ala-Nissila
2
MSP Group, QTF Centre of Excellence, Department of Applied Physics, Aalto University
, FI-00076 Aalto, Finland
5
Interdisciplinary Centre for Mathematical Modelling, Department of Mathematical Sciences, Loughborough University
, Loughborough, Leicestershire LE11 3TU, United Kingdom
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a)Author to whom correspondence should be addressed: brucenju@gmail.com
b)
Electronic mail: qianping@ustb.edu.cn
c)
Electronic mail: yjsu@ustb.edu.cn
Note: This paper is part of the Special Topic on Engineering and Understanding of Thermal Conduction in Materials.
J. Appl. Phys. 130, 235102 (2021)
Article history
Received:
August 29 2021
Accepted:
November 27 2021
Citation
Haikuan Dong, Petri Hirvonen, Zheyong Fan, Ping Qian, Yanjing Su, Tapio Ala-Nissila; Heat transport across graphene/hexagonal-BN tilted grain boundaries from phase-field crystal model and molecular dynamics simulations. J. Appl. Phys. 21 December 2021; 130 (23): 235102. https://doi.org/10.1063/5.0069134
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