Design of electromechanical switch based on armchair twisted graphene nanoribbons with doping and defect

2019 ◽  
Vol 569 ◽  
pp. 48-56 ◽  
Author(s):  
Somayeh Fotoohi ◽  
Mansoureh Pashangpour ◽  
Hamed Lashgari
Keyword(s):  
Graphene Nanoribbons ◽  
Twisted Graphene

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...

scholarly journals Electromechanics of twisted graphene nanoribbons

2011 ◽  
Vol 99 (1) ◽  
pp. 013105 ◽  
Author(s):  
Pekka Koskinen
Keyword(s):  
Graphene Nanoribbons ◽  
Twisted Graphene

Altering regularities of electronic transport properties in twisted graphene nanoribbons

2012 ◽  
Vol 101 (2) ◽  
pp. 023104 ◽  
Author(s):  
G. P. Tang ◽  
J. C. Zhou ◽  
Z. H. Zhang ◽  
X. Q. Deng ◽  
Z. Q. Fan
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
Graphene Nanoribbons ◽  
Electronic Transport Properties ◽  
Twisted Graphene

scholarly journals Moiré edge states in twisted graphene nanoribbons

2018 ◽  
Vol 97 (20) ◽  
Author(s):  
M. Fleischmann ◽  
R. Gupta ◽  
D. Weckbecker ◽  
W. Landgraf ◽  
O. Pankratov ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Edge States ◽  
Twisted Graphene

Thermoelectric Performance of Twisted Graphene Nanoribbons

2014 ◽  
Vol 1070-1072 ◽  
pp. 594-599 ◽  
Author(s):  
Wen Jiang Liu ◽  
Shao Hong Cai ◽  
Ming Sen Deng
Keyword(s):  
Electronic Structures ◽  
Phonon Dispersion ◽  
Graphene Nanoribbons ◽  
Twist Angle ◽  
Thermal Conductance ◽  
Calculation Results ◽  
Thermoelectric Transport Properties ◽  
Armchair Graphene Nanoribbons ◽  
Twisted Graphene ◽  
Phonon Dispersion Relations

We theoretically investigate the thermoelectric properties of twisted armchair graphene nanoribbons (TAGNR) with various rotation angles. We find that the twist engineering applied to AGNR can alter the thermoelectric transport properties by modifying the electronic structures and phonon dispersion relations. With twist angle increasing , the thermal conductance tend to decrease, and the can tunable with different twist angle. Our calculation results suggests a possible route to increase the ZT values of AGNR-N for potential thermoelectric applications.

scholarly journals Growth of carbon nanotubes via twisted graphene nanoribbons

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Hong En Lim ◽  
Yasumitsu Miyata ◽  
Ryo Kitaura ◽  
Yoshifumi Nishimura ◽  
Yoshio Nishimoto ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Nanoribbons ◽  
Twisted Graphene

ELECTRONIC STRUCTURE OF GRAPHENE NANORIBBONS SUBJECTED TO TWIST AND NONUNIFORM STRAIN

2011 ◽  
Vol 20 (01) ◽  
pp. 153-160 ◽  
Author(s):  
A. DOBRINSKY ◽  
A. SADRZADEH ◽  
B. I. YAKOBSON ◽  
J. XU
Keyword(s):  
Band Gap ◽  
Density Functional ◽  
Graphene Nanoribbons ◽  
Tight Binding ◽  
Tight Binding Approximation ◽  
Functional Theory ◽  
Gap Opening ◽  
Gap Creation ◽  
Band Gap Modulation ◽  
Twisted Graphene

Graphene nanoribbons exhibit band gap modulation when subjected to strain. While band gap creation has been theoretically investigated for uniaxial strains, other deformations such as nanoribbon twist have not been considered. Our main objective in this paper is to explore band gap opening in twisted graphene nanoribbons that have metallic properties under tight-binding approximation. While simple considerations based on the Hückel model allow to conclude that zigzag graphene nanoribbons exhibit no band gap when subjected to twist, the Hückel model overall may be inaccurate for band gap prediction in metallic nanoribbons. We utilize Density Functional Theory Tight-Binding Approximation together with a requirement that energy of twisted nanoribbons is minimized to evaluate band gap of metalic armchair nanoribbons. Besides considering twisting deformations, we also explore the possibility of creating band gap when graphene nanoribbons are subject to inhomogeneous deformation such as sinusoidal deformations.

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