Effect of uniaxial strain on electrical conductance and band gap of superlattice-graphene nanoribbons

Khoeini, Farhad

doi:10.1016/j.spmi.2015.02.002

Cited by 17 publications

(5 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the past few decades, nanostructured superlattices, due to their physical properties and the possibility of engineering structural properties in electronic devices, have attracted the attention of researchers [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Thermal transport in two-dimensional C3N/C2N superlattices: A molecular dynamics approach

Razzaghi

Khoeini

Rajabpour

et al. 2021

International Journal of Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Thermal transport in two-dimensional C3N/C2N superlattices: A molecular dynamics approach

Razzaghi

Khoeini

Rajabpour

et al. 2021

International Journal of Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

“…Various shaped nanostructures provide an appealing way for precisely controlling the electronic properties of nanodevices to develop the electronic applications of these nanostructures. Ever since, various graphene-based nanodevices [13][14][15][16][17], especially its nanojunctions [18][19][20][21][22][23], have been widely studied, and exotic electronic properties have been reported. Beside, more spin and electron transport phenomena could also be modulated by other shaped nanomaterials, such that it has been reported recently, e.g.…”

Section: Introductionmentioning

confidence: 99%

Topological and transport properties of graphene-based nanojunctions subjected to a magnetic field

Mahdavifar

Khoeini²

2019

Nanotechnology

Self Cite

View full text Add to dashboard Cite

We study the topological properties of finite-size S-shaped graphene junctions with distinctive edge features subjected to the perpendicular magnetic field, using the tight-binding model. The quantum confinement and edge effects induced by the specific junction give rise to significant modifications in the Hofstadter spectra of the bent flakes, when compared to those of their perfect forms. Moreover, the results show that in absence of a magnetic field, the sharpest zigzag-edged corners support the edge states rather than the others, but the magnetic field leads to the localization of the edge states along the whole perimeter of the flakes. Furthermore, based on the Green's function method, we investigate the electron transport through our proposed junctions. We show that, under magnetic flux, one can effectively control the energy gap and the conductance around the Fermi energy. Moreover, the transitions between metallic, semimetallic, and semiconducting phases are possible by the magnetic flux in the S-shaped junctions.

show abstract

“…The purpose of the present research is to investigate the effect of length in greater detail and reveal the influence of chemical functionalization on ribbons stability, electronic properties, chemical activity and intrinsic electric dipole moment. This is crucial for a number of recently proposed applications, for instance gas sensing [26], nanophotonics [28][29][30], digital electronics [31][32][33] and quantum information [34]. In what follows, we present the structures in question and details of the computation model in Section 2, present and discuss results in Section 3 and provide summary in Section 4.…”

Section: Nm Long Nanoribbons the Low-energy Optical Selection Rules Of Infinitely Long Nanoribbons Are Well Reproduced Additionally The Dmentioning

confidence: 99%

Edge functionalization of finite graphene nanoribbon superlattices

Abdelsalam

Saroka

Younis

2019

Superlattices and Microstructures

View full text Add to dashboard Cite

The effect of chemical functionalization on the electronic properties of graphene nanoribbon superlattices with zigzag and armchair terminations is investigated using the density functional theory. The calculated positive binding energies imply that all the considered structures are stable before and after chemical modifications. The superlattices with armchair edges are characterized by a wide energy gap while those with zigzag edges have a narrow energy gap. The energy gap in superlattices with armchair edges nearly independent of their length while it strongly decreases and almost closes in superlattices with zigzag edges. The energy gap is comparably sensitive to the width variations in both types of the superlattices. It was found that the electric dipole moment increases with increasing the width in the case of armchair while it oscillates in zigzag superlattices. The electric dipole moment can be enhanced by chemical functionalization with COOH and NH2 groups. The effect of this functionalization is moderate for the energy gap, but the adsorption of tetracyanoquinodimethane transforms the system from insulator (E g =2.66 eV) to a narrow band gap semiconductor (E g =0.25 eV). The adsorption energy of tetracyanoquinodimethane and tetrathiafulvalene molecules can be enhanced by chemical functionalization which makes graphene superlattices useful for sensor applications and wastewater treatment.

show abstract

Effect of uniaxial strain on electrical conductance and band gap of superlattice-graphene nanoribbons

Cited by 17 publications

References 48 publications

Thermal transport in two-dimensional C3N/C2N superlattices: A molecular dynamics approach

Thermal transport in two-dimensional C3N/C2N superlattices: A molecular dynamics approach

Topological and transport properties of graphene-based nanojunctions subjected to a magnetic field

Edge functionalization of finite graphene nanoribbon superlattices

Contact Info

Product

Resources

About