Uniaxial strain in graphene and armchair graphene nanoribbons: An ab initio study

2010 ◽  
Vol 523 (1-2) ◽  
pp. 137-144 ◽  
Author(s):  
N. Rosenkranz ◽  
M. Mohr ◽  
C. Thomsen
Keyword(s):  
Ab Initio ◽  
Graphene Nanoribbons ◽  
Uniaxial Strain ◽  
Ab Initio Study ◽  
Armchair Graphene Nanoribbons ◽  
Armchair Graphene

Ab initio study of iron adatom-vacancies in armchair graphene nanoribbons

2018 ◽  
Vol 276 ◽  
pp. 9-13 ◽  
Author(s):  
L. Benchallal ◽  
S. Haffad ◽  
F. Boubenider ◽  
L. Lamiri ◽  
H. Zitoune ◽  
...  
Keyword(s):  
Ab Initio ◽  
Graphene Nanoribbons ◽  
Ab Initio Study ◽  
Armchair Graphene Nanoribbons ◽  
Armchair Graphene

Spin gapless armchair graphene nanoribbons under magnetic field and uniaxial strain

2013 ◽  
Vol 22 (8) ◽  
pp. 087303
Author(s):  
Hai-Ping Hou ◽  
Yue-E Xie ◽  
Yuan-Ping Chen ◽  
Tao Ouyang ◽  
Qing-Xia Ge ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Graphene Nanoribbons ◽  
Uniaxial Strain ◽  
Armchair Graphene Nanoribbons ◽  
Armchair Graphene

Exciton effects in strained armchair graphene nanoribbons

2016 ◽  
Vol 30 (06) ◽  
pp. 1650021 ◽  
Author(s):  
Yonglei Jia ◽  
Junlin Liu
Keyword(s):  
Binding Energy ◽  
Excitation Energy ◽  
Graphene Nanoribbons ◽  
Tight Binding ◽  
Uniaxial Strain ◽  
Exciton Binding Energy ◽  
Coulomb Interactions ◽  
Optomechanical Systems ◽  
Armchair Graphene Nanoribbons ◽  
Armchair Graphene

The exciton effects in 1-nm-wide armchair graphene nanoribbons (AGNRs) under the uniaxial strain were studied within the nonorthogonal tight-binding (TB) model, supplemented by the long-range Coulomb interactions. The obtained results show that both the excitation energy and exciton binding energy are modulated by the uniaxial strain. The variation of these energies depends on the ribbon family. In addition, the results show that the variation of the exciton binding energy is much weaker than the variation of excitation energy. Our results provide new guidance for the design of optomechanical systems based on graphene nanoribbons.

scholarly journals Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons

2019 ◽  
Vol 21 (47) ◽  
pp. 26027-26032
Author(s):  
Wudmir Y. Rojas ◽  
Cesar E. P. Villegas ◽  
Alexandre R. Rocha
Keyword(s):  
Ab Initio ◽  
Transport Properties ◽  
Spin Relaxation ◽  
Graphene Nanoribbons ◽  
Relaxation Length ◽  
Spin Dependent Transport ◽  
Armchair Graphene Nanoribbons ◽  
Dependent Transport ◽  
Armchair Graphene

Ab initio spin-dependent transport properties of armchair graphene nanoribbons are studied with emphasis in determining the spin-relaxation length.

Electronic properties of armchair graphene nanoribbons under uniaxial strain and electric field

2018 ◽  
Vol 32 (24) ◽  
pp. 1850263 ◽  
Author(s):  
Li-Feng Jiang ◽  
Lei Xu ◽  
Jun Zhang
Keyword(s):  
Electric Field ◽  
Electronic Properties ◽  
Energy Gap ◽  
Graphene Nanoribbons ◽  
Uniaxial Strain ◽  
Quantum Phenomenon ◽  
Suitable Combination ◽  
Armchair Graphene Nanoribbons ◽  
Opening And Closing ◽  
Armchair Graphene

The armchair graphene nanoribbons (AGNRs) can be either semiconducting or metallic, depending on their widths. We investigate the electronic properties of AGNRs under uniaxial strain and electric field. We find that the bulk gap decreases gradually with the increase of the electric field for semiconducting case, but it cannot vanish completely in an appropriate range, which is similar to that of a single uniaxial strain. However, a suitable combination of electric field and uniaxial strain can lead to that the energy gap completely vanishes and reopens. For the metallic case, the bulk gap can display the same opening and closing behavior under an electric field and uniaxial strain. Finally, an interesting quantum phenomenon is obtained by applying a perpendicular magnetic field.

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