Anisotropy and Edge Roughness Scattering in the Lattice Thermal Conductivity of Graphene Nanoribbons

2019 ◽  
Vol 35 (25) ◽  
pp. 195-200 ◽  
Author(s):  
Zlatan Aksamija ◽  
Irena Knezevic
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Graphene Nanoribbons ◽  
Edge Roughness

Lattice Dynamics of Graphene Nanoribbons under Twisting

2021 ◽  
Author(s):  
Zhao Liu ◽  
Zhen Zhang ◽  
Hui-Yan Zhao ◽  
Jing Wang ◽  
Ying Liu
Keyword(s):  
Thermal Conductivity ◽  
Lattice Dynamics ◽  
Density Functional ◽  
Lattice Thermal Conductivity ◽  
Graphene Nanoribbons ◽  
Tight Binding ◽  
Tight Binding Method ◽  
Twisted Graphene

In this communication, we investigate the lattice dynamics of twisted graphene nanoribbons utilizing the density-functional tight-binding method based on screw symmetry and report the reduced lattice thermal conductivity due to...

Atomistic Study of the Lattice Thermal Conductivity of Rough Graphene Nanoribbons

2013 ◽  
Vol 60 (7) ◽  
pp. 2142-2147 ◽  
Author(s):  
Hossein Karamitaheri ◽  
Mahdi Pourfath ◽  
Rahim Faez ◽  
Hans Kosina
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Graphene Nanoribbons ◽  
Atomistic Study

Thermal Conductivity of Graphene Nanoribbons: Effect of the Edges and Ribbon Width

2012 ◽  
Vol 134 (12) ◽  
Author(s):  
Paul Plachinda ◽  
David Evans ◽  
Raj Solanki
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Graphene Nanoribbons ◽  
Thermal Conductance ◽  
Ribbon Width ◽  
Edge Termination ◽  
Relative Contribution ◽  
Edge Roughness ◽  
Edge Scattering ◽  
Good Agreement

We have calculated thermal conductance of graphene nanoribbons (GNRs) and their dependence on the type of ribbon edge termination (zigzag or armchair) and the width of the ribbon, which ranges from 50 Å to 50 μm. Our model incorporates the effect of edge roughness and includes edge roughness correlation functions for both types of termination. The dependence of thermal conductance on the width of the ribbons and relative contribution of different scattering mechanisms are also analyzed by means of the Green’s function approach to the edge scattering. High temperature thermal conductance of the nanoribbons was found to be 0.15 nW/K and 0.18 nW/K (corresponding to thermal conductivity, 4641 and 5266 W/mK, respectively, for 10 μm long GNRs) which is in a good agreement with the experimental results.

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