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Title: Unusual Enhancement in Intrinsic Thermal Conductivity of Multilayer Graphene by Tensile Strains

Journal Article · · Nano Letters
 [1];  [2];  [1]
  1. Hong Kong Univ. of Science and Technology (Hong Kong)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

High basal plane thermal conductivity k of multi-layer graphene makes it promising for thermal management applications. Here we examine the effects of tensile strain on thermal transport in this system. Using a first principles Boltzmann-Peierls equation for phonon transport approach, we calculate the room-temperature in-plane lattice k of multi-layer graphene (up to four layers) and graphite under different isotropic tensile strains. The calculated in-plane k of graphite, finite mono-layer graphene and 3-layer graphene agree well with previous experiments. The dimensional transitions of the intrinsic k and the extent of the diffusive transport regime from mono-layer graphene to graphite are presented. We find a peak enhancement of intrinsic k for multi-layer graphene and graphite with increasing strain and the largest enhancement amplitude is about 40%. In contrast the calculated intrinsic k with tensile strain decreases for diamond and diverges for graphene, we show that the competition between the decreased mode heat capacities and the increased lifetimes of flexural phonons with increasing strain contribute to this k behavior. Similar k behavior is observed for 2-layer hexagonal boron nitride systems, suggesting that it is an inherent thermal transport property in multi-layer systems assembled of purely two dimensional atomic layers. This study provides insights into engineering k of multi-layer graphene and boron nitride by strain and into the nature of thermal transport in quasi-two-dimensional and highly anisotropic systems.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1214511
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 9 Vol. 15; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Strain engineering of phonon thermal transport properties in monolayer 2H-MoTe 2 journal January 2017
Nonmonotonic strain dependence of lattice thermal conductivity in monolayer SiC: a first-principles study journal January 2018
Ultrahigh thermal conductivity of carbon allotropes with correlations with the scaled Pugh ratio journal January 2019
Disparate strain response of the thermal transport properties of bilayer penta-graphene as compared to that of monolayer penta-graphene journal January 2019
Ultra-low thermal conductivity and high thermoelectric performance of two-dimensional triphosphides (InP 3 , GaP 3 , SbP 3 and SnP 3 ): a comprehensive first-principles study journal January 2020
Phonon thermal properties of graphene on h-BN from molecular dynamics simulations journal March 2017
Strain engineering in functional 2-dimensional materials journal February 2019
Size-dependent mode contributions to the thermal transport of suspended and supported graphene journal September 2019
Efficient thermal conductivity modulation by manipulating interlayer interactions: A comparative study of bilayer graphene and graphite journal September 2019
A Review of Thermal Transport in Low-Dimensional Materials Under External Perturbation: Effect of Strain, Substrate, and Clustering journal January 2017
Biaxial tensile strain tuned up-and-down behavior on lattice thermal conductivity in β -AsP monolayer journal June 2018
Towards a simplified description of thermoelectric materials: accuracy of approximate density functional theory for phonon dispersions journal July 2019
Thermal transport of carbon nanomaterials journal January 2020
Thermal conductivity of carbon nanoring linked graphene sheets: A molecular dynamics investigation journal September 2017
Thermal Transport in Crystals as a Kinetic Theory of Relaxons journal October 2016
Colloquium : Phononic thermal properties of two-dimensional materials journal November 2018
The Influence of Dispersion State of Graphene Sheets on the Microstructure and Thermal Conductivity of Free-Standing Reduced Graphene Oxide Films journal March 2019
Accelerating evaluation of converged lattice thermal conductivity text January 2018

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