Effects of A Magnetic Field on the Transport and Noise Properties of a Graphene Ribbon with Antidots

Marconcini, Paolo; Macucci, Massimo

doi:10.3390/nano10112098

Cited by 5 publications

(5 citation statements)

References 74 publications

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“…It is also investigated that current fluctuations are observed in the current passing through nano-scaled GNR devices such as GNRFET [45,46]. These current fluctuations should be a minimum for nanoscale devices to have practical applications [47]. Therefore, it is indispensable to know the magnitude of these current fluctuations for advancement in nanoscale electronics.…”

Section: Introductionmentioning

confidence: 99%

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Certain Aspects of Quantum Transport in Zigzag Graphene Nanoribbons

Pratap

Kumar

Singh³

2022

Front. Phys.

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We have investigated the Fano factor and shot noise theoretically in the confined region of the potential well of zigzag graphene nanoribbon (ZGNR). We have found that the Fano factor is approximately 1, corresponding to the minimum conductivity (σ) for both symmetrical and asymmetrical potential wells. The conductivity plot with respect to Fermi energy appears as symmetrical plateaus on both sides of zero Fermi energy. Moreover, a peak observed at zero Fermi energy in the local density of states (LDOS) confirms the edge states in the system. The transmission properties of ZGNR in the confined region of the potential well are examined using the standard tight-binding Green’s function approach. The perfect transmission observed in the confined region of the potential well shows that pnp type transistors can be made with ZGNR. We have discussed the Fano factor, shot noise, conductivity, and nanohub results in the continuation of previous results. Our results show that the presence of van-Hove singularities in the density of states (DOS) matters in the presence of edge states. The existence of these edge states is sensitive to the number of atoms considered and the nature of the potential wells. We have compared our numerical results with the results obtained from the nanohub software (CNTbands) of Purdue University.

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Section: Introductionmentioning

confidence: 99%

“…Several theoretical and experimental studies have been conducted on calculating shot noise and Fano factor in the case of GNRs [46,47,54]. Recently, Marconcini et al calculated the Fano factor for disordered graphene samples biased by two side gates.…”

Section: Introductionmentioning

confidence: 99%

Certain Aspects of Quantum Transport in Zigzag Graphene Nanoribbons

Pratap

Kumar

Singh³

2022

Front. Phys.

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“…Also, at a very high value of magnetic field strength, the impact of the antidots and shot noise disappears entirely. [ 331 ] Lopez‐Urías et al used first‐principle simulations to show that the doping and functionalization with phosphorus (P) can alter graphene nanoribbon's electric and magnetic characteristics. In ZGNRs, the combined effect of P‐doping and topological defects supports ferromagnetism.…”

Section: Magnetic Properties Of Graphene Nanoribbonsmentioning

confidence: 99%

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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“…For low values of the magnetic field, we notice the presence of peaks in the conductance for values of the magnetic field that are multiples of a value

T, and

T. This behavior can be explained, as in Refs. [ 43 , 71 ], with the fact that for low values of the magnetic field, when a quantum Hall regime has not yet been reached, we can assume that the charges move along cyclotron orbits [ 75 ] with cyclotron radius [ 43 , 76 ]

…”

Section: Numerical Simulationsmentioning

confidence: 99%

Transport Simulation of Graphene Devices with a Generic Potential in the Presence of an Orthogonal Magnetic Field

Marconcini

Macucci

2022

Nanomaterials

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The effect of an orthogonal magnetic field is introduced into a numerical simulator, based on the solution of the Dirac equation in the reciprocal space, for the study of transport in graphene devices consisting of armchair ribbons with a generic potential. Different approaches are proposed to reach this aim. Their efficiency and range of applicability are compared, with particular focus on the requirements in terms of model setup and on the possible numerical issues that may arise. Then, the extended code is successfully validated, simulating several interesting magnetic-related phenomena in graphene devices, including magnetic-field-induced energy-gap modulation, coherent electron focusing, and Aharonov–Bohm interference effects.

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Effects of A Magnetic Field on the Transport and Noise Properties of a Graphene Ribbon with Antidots

Cited by 5 publications

References 74 publications

Certain Aspects of Quantum Transport in Zigzag Graphene Nanoribbons

Certain Aspects of Quantum Transport in Zigzag Graphene Nanoribbons

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

Transport Simulation of Graphene Devices with a Generic Potential in the Presence of an Orthogonal Magnetic Field

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