A theoretical investigation on the transport properties of overlapped graphene nanoribbons

Berahman, M.; Sanaee, Maryam; Ghayour, Rahim

doi:10.1016/j.carbon.2014.04.020

Cited by 23 publications

(18 citation statements)

References 23 publications

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“…These oscillations imply that there are voltage intervals with a strongly pronounced negative differential resistance, the same as in previous calculations for graphene nanoribbons [14,15,17]. Such a behavior is known to originate from the interference of carrier paths through the quasilocalized states in the bilayer region [16,17] or from Fabry-Pérot-like interference of one propagating channel with itself [16].…”

Section: Conductance Between Pristine Graphene Layerssupporting

confidence: 71%

“…The tunneling conductance of such systems based on nanoribbons is found to change by an order of magnitude upon atomic-scale in-plane relative displacement of the layers [13]. Resonances and anti-resonances in the transmission as a function of the carrier energy and overlap length have been explained [16,17,19]. The case of crossed graphene nanoribbons has also been addressed [20,21].…”

Section: Introductionmentioning

confidence: 98%

“…Significant variations in the band gap of bilayer graphene nanoribbons upon atomic-scale in-plane relative displacement of their layers are found using density functional theory (DFT) calculations [11,12]. Quasi one-dimensional transport in systems consisting of two overlapping layers [13][14][15][16][17] or a layer with an adsorbed graphene flake [16,18,19], both with a central bilayer region, has been recently a subject of extensive research. The tunneling conductance of such systems based on nanoribbons is found to change by an order of magnitude upon atomic-scale in-plane relative displacement of the layers [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tunneling conductance of telescopic contacts between graphene layers with and without dielectric spacer

Lebedeva

Popov

Knizhnik

et al. 2015

Computational Materials Science

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Section: Conductance Between Pristine Graphene Layerssupporting

confidence: 71%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tunneling conductance of telescopic contacts between graphene layers with and without dielectric spacer

Lebedeva

Popov

Knizhnik

et al. 2015

Computational Materials Science

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“…By specifying a local basis set as the proposed answer, we show that the nonzero part of the matrices in Eq. 4 constitute of finite surface states [44][45][46].…”

Section: Methodsmentioning

confidence: 99%

Sensitive DNA detection based on the capacitance properties of graphene

et al. 2016

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In the present paper, a new method is proposed to distinguish the DNA nucleotides based on a first-principles calculation of the electronic features of DNA bases which are chemisorbed to a graphene sheet placed between two gold electrodes in a contact-channel-contact system. The capacitance properties of graphene in the channel are simulated and analyzed using non-equilibrium Green's functions combined with density functional theory. Thus, the capacitance properties of graphene are theoretically deciphered in a biological environment, and, using a novel method, the effect of the chemisorbed DNA nucleotides on electrical charges on the surface of graphene is investigated. Several parameters in this method are also extracted including the electrostatic energy, induced density, induced electrostatic potential, electron difference potential, and electron difference density. The qualitative and quantitative differences among these parameters can be used to identify DNA nucleotides.

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“…channels introduced by the interface. [23][24][25][26][27][28][29] On the other hand, theoretical investigations of the transport through bilayer flake sandwiched between two monolayer nanoribbons have revealed that the conductance oscillates between maximum and zero as a function of bilayer flake length.…”

Section: -12mentioning

confidence: 99%

Supercurrent reversal in Josephson junctions based on bilayer graphene flakes

2015

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We investigate the Josephson effect in a bilayer graphene flake contacted by two monolayer sheet deposited by superconducting electrodes. It is found that when the electrodes are attached to the different layers of the bilayer, the Josephson current is in a π state when the bilayer region is undoped and in the absence of vertical bias. Applying doping or bias to the junction reveals π − 0 transitions which can be controlled by varying the temperature and the junction length. The supercurrent reversal here is very different from the ferromagnetic Josephson junctions where the spin degree of freedom plays the key role. We argue that the scattering processes accompanied by layer and sublattice index change give rise to the scattering phases which their effect varies with doping and the bias. Such scattering phases are responsible for the π − 0 transitions. On the other hand if both of the electrodes are coupled to the same layer of the flake or the flake has AA stacking instead of common AB, the junction will be always in 0 state since layer or sublattice index is not changed.

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A theoretical investigation on the transport properties of overlapped graphene nanoribbons

Cited by 23 publications

References 23 publications

Tunneling conductance of telescopic contacts between graphene layers with and without dielectric spacer

Tunneling conductance of telescopic contacts between graphene layers with and without dielectric spacer

Sensitive DNA detection based on the capacitance properties of graphene

Supercurrent reversal in Josephson junctions based on bilayer graphene flakes

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