Modification of mechanical, electronic and transport properties of AB-stacked bilayer hybrid armchair graphene nanoribbons: Concurrent influence of chemical derivation and uniaxial strain

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.

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Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons

Physical Chemistry Chemical Physics ◽

10.1039/c9cp04054d ◽

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.

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Spin transport properties of armchair graphene nanoribbons doped with Fe and B atoms

Materials Science and Engineering B ◽

10.1016/j.mseb.2019.04.014 ◽

2019 ◽

Vol 243 ◽

pp. 167-174 ◽

Cited By ~ 5

Author(s):

Tayebeh Movlarooy ◽

Parvin Zanganeh

Keyword(s):

Transport Properties ◽

Spin Transport ◽

Graphene Nanoribbons ◽

Armchair Graphene Nanoribbons ◽

Armchair Graphene

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

International Journal of Modern Physics B ◽

10.1142/s0217979218502636 ◽

2018 ◽

Vol 32 (24) ◽

pp. 1850263 ◽

Cited By ~ 1

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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