Edge-defect induced spin-dependent Seebeck effect and spin figure of merit in graphene nanoribbons

2017 ◽  
Vol 19 (39) ◽  
pp. 27132-27139 ◽  
Author(s):  
Qing-Bo Liu ◽  
Dan-Dan Wu ◽  
Hua-Hua Fu
Keyword(s):  
Figure Of Merit ◽  
Graphene Nanoribbons ◽  
Seebeck Effect ◽  
Function Approach ◽  
First Principle ◽  
Edge Defect ◽  
First Principle Calculations ◽  
Edge Defects ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

By using first-principle calculations combined with the non-equilibrium Green's function approach, we have studied spin caloritronic properties of graphene nanoribbons (GNRs) with different edge defects.

Strained effects on the thermal conductance of flexural and in-plane modes in graphene nanoribbons

2019 ◽  
Vol 33 (31) ◽  
pp. 1950383
Author(s):  
Bengang Bao ◽  
Gao-Hua Liao ◽  
Jun He ◽  
Chang-Ning Pan
Keyword(s):  
Transport Properties ◽  
Phonon Mode ◽  
Graphene Nanoribbons ◽  
Thermal Conductance ◽  
Low Frequency ◽  
Phonon Transport ◽  
Frequency Region ◽  
Function Approach ◽  
Non Equilibrium Green’S Function ◽  
Plane Mode

Ballistic thermal transport properties in graphene nanoribbon modulated with strain are investigated by non-equilibrium Green’s function approach. The results show that the strain can suppress the phonon transport of flexural phonon mode (FPM) and enhance the phonon transport of in-plane mode (IPM) in low-frequency region, leading to the reduction in the thermal conductance of FPM and the enhancement in the thermal conductance of IPM. The total thermal conductance is decreased by strain as the reduction in the thermal conductance of FPM overcomes the enhancement in the thermal conductance of IPM.

Adatom bond-induced geometric and electronic properties of passivated armchair graphene nanoribbons

2015 ◽  
Vol 17 (25) ◽  
pp. 16545-16552 ◽  
Author(s):  
Yu-Tsung Lin ◽  
Hsien-Ching Chung ◽  
Po-Hua Yang ◽  
Shih-Yang Lin ◽  
Ming-Fa Lin
Keyword(s):  
Electronic Properties ◽  
Chemical Bonding ◽  
Graphene Nanoribbons ◽  
First Principle ◽  
First Principle Calculations ◽  
Armchair Graphene Nanoribbons ◽  
Geometric And Electronic Properties ◽  
Armchair Graphene

The geometric and electronic properties of passivated armchair graphene nanoribbons, enriched by strong chemical bonding between edge-carbons and various adatoms, are investigated by first-principle calculations.

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