Electronic transport on graphene armchair-edge nanoribbons with Fermi velocity and potential barriers

Nascimento, A. C. S.; Lima, R. P. A.; Lyra, Marcelo L.; Lima, Jonas R.F.

doi:10.1016/j.physleta.2019.04.052

Cited by 20 publications

(18 citation statements)

References 62 publications

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“…In equation ( 4), labels the mode of propagation, and is equal to 1/3 (0) for a semiconductor (metallic) nanoribbon [37]. In matrix equation (3), the applied potential ( ) and the Fermi velocity ( ) are given in the barrier and well regions by the following expressions [35,36]:…”

Section: Theorymentioning

confidence: 99%

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Modulating the Conductance in Graphene Nanoribbons with Multi-Barriers Under an Applied Voltage

Dakhlaoui

Almansour

Belhadj

et al. 2021

Preprint

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The electronic transmission and conductance produced by Dirac electrons in an armchair graphene nanoribbon under an external voltage are investigated with the transfer matrix method. We investigate the velocity and voltage of nanoribbons in the presence of single and multiple barriers and show that the transmission coefficients can be controlled by varying the order of the mode, the number of carbon atoms, and the barrier velocities. In particular, we find that the nanoribbon appears to be fully transparent when the barrier and Fermi velocities are equal. Our numerical results show that the electronic conductance is sensitive to the applied external voltage and number of carbon atoms, which can be used to tailor the electronic properties of graphenebased devices.

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Section: Theorymentioning

confidence: 99%

“…After calculating the transmission coefficient, the electronic conductance ( ) is easily obtained from the Landauer-Buttiker formalism [35]:…”

Section: Theorymentioning

confidence: 99%

Modulating the Conductance in Graphene Nanoribbons with Multi-Barriers Under an Applied Voltage

Dakhlaoui

Almansour

Belhadj

et al. 2021

Preprint

View full text Add to dashboard Cite

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“…In equation ( 4), 𝑚 labels the mode of propagation, and 𝛽 is equal to 1/3 (0) for a semiconductor (metallic) nanoribbon [37]. In matrix equation (3), the applied potential 𝑉(𝑥) and the Fermi velocity 𝑣 𝐹 (𝑥) are given in the barrier and well regions by the following expressions [35,36]:…”

Section: Theorymentioning

confidence: 99%

“…After calculating the transmission coefficient, the electronic conductance 𝐺(𝐸) is easily obtained from the Landauer-Buttiker formalism [35]:…”

Section: Theorymentioning

confidence: 99%

“…The electronic properties of AGNs modulated with a potential barrier were examined by Benliang Zhou et al, [34] who showed that the conductance could exhibit distinct minima when the barrier width was altered. Nascimento et al [35] studied the electron transport of Dirac electrons through a nanoribbon and showed that the Fermi and barrier velocities could be tuned to modulate the electronic properties of graphene-based materials. Despite the previous studies on this topic, an investigation of the transmission coefficient and electronic conductance through multibarrier armchair graphene nanoribbons under the effect of an applied voltage has not been carried out.…”

Section: Introductionmentioning

confidence: 99%

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Modulating the Conductance in Graphene Nanoribbons with Multi-Barriers Under an Applied Voltage

Dakhlaoui

Almansour

Belhadj

et al. 2021

Preprint

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Electronic, transport, magnetic, and optical properties of graphene nanoribbons and their optical sensing applications: A comprehensive review

et al. 2022

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Low dimensional materials have attracted great research interest from both theoretical and experimental point of views. These materials exhibit novel physical and chemical properties due to the confinement effect in low dimensions. The experimental observations of graphene open a new platform to study the physical properties of materials restricted to two dimensions. This featured article provides a review on the novel properties of quasi one‐dimensional (1D) material known as graphene nanoribbon. Graphene nanoribbons can be obtained by unzipping carbon nanotubes (CNT) or cutting the graphene sheet. Alternatively, it is also called the finite termination of graphene edges. It gives rise to different edge geometries, namely zigzag and armchair, among others. There are various physical and chemical techniques to realize these materials. Depending on the edge type termination, these are called the zigzag and armchair graphene nanoribbons (ZGNR and AGNR). These edges play an important role in controlling the properties of graphene nanoribbons. The present review article provides an overview of the electronic, transport, optical, and magnetic properties of graphene nanoribbons. However, there are different ways to tune these properties for device applications. Here, some of them, such as external perturbations and chemical modifications, are highlighted. Few applications of graphene nanoribbon have also been briefly discussed.

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Electronic transport on graphene armchair-edge nanoribbons with Fermi velocity and potential barriers

Cited by 20 publications

References 62 publications

Modulating the Conductance in Graphene Nanoribbons with Multi-Barriers Under an Applied Voltage

Modulating the Conductance in Graphene Nanoribbons with Multi-Barriers Under an Applied Voltage

Modulating the Conductance in Graphene Nanoribbons with Multi-Barriers Under an Applied Voltage

Electronic, transport, magnetic, and optical properties of graphene nanoribbons and their optical sensing applications: A comprehensive review

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