Spin current generation and control in carbon nanotubes by combining rotation and magnetic field

Cunha, Márcio M.; Lima, Jonas R.F.; Moraes, Fernando; Fumeron, Sébastien; Berche, Bertrand

doi:10.1088/1361-648x/ab6f8a

Cited by 7 publications

(5 citation statements)

References 35 publications

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“…Our findings are also beneficial to study the combined effect of electromagnetic field and Coriolis force on electronic energy eigenvalues in carbon nanotubes. [ 47,48 ]…”

Section: Discussionmentioning

confidence: 99%

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Spin density polarization effects in the presence of Coriolis force on ion acoustic waves in quantum plasma

Hussain

Abdikian

Hasnain

2020

Contributions to Plasma Physics

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Ion acoustic solitary waves in a quantum plasma, which is slowly rotating around an axis at an angle θ with the direction of magnetic field, are investigated. Quantum hydrodynamic model is under consideration with the effects of rotations which are included via Coriolis force. Fermions are degenerate and have different spin density states, that is, up and down characterized via parameter α. Linear analysis is performed by applying Fourier transformation to derive dispersion relation. For nonlinear analysis, we apply reductive perturbation method to derive Korteweg de Vries equation (KdV). The effects of variations of Coriolis force, spin polarization, and quantum parameter on characteristics of solitary structure are discussed. These results are applicable to astrophysical and laboratory plasmas.

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“…Our findings are also beneficial to study the combined effect of electromagnetic field and Coriolis force on electronic energy eigenvalues in carbon nanotubes. [ 47,48 ]…”

Section: Discussionmentioning

confidence: 99%

“…Our findings are also beneficial to study the combined effect of electromagnetic field and Coriolis force on electronic energy eigenvalues in carbon nanotubes. [47,48] DATA AVAILABILITY STATEMENT Data sharing not applicable to this article as no datasets were generated or analysed during the current study…”

mentioning

confidence: 99%

Spin density polarization effects in the presence of Coriolis force on ion acoustic waves in quantum plasma

Hussain

Abdikian

Hasnain

2020

Contributions to Plasma Physics

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“…Now, we focus on the currents and transfer probability between the quantum dot and SWCNT. It has been pointed out that the conventional current density usually following 45 , 46 and can be derived as this operator from the standard quantum-mechanical continuity equation modified by taking into account Dirac-like equation for electrons in the nanotube, (see the supplement ) defined as To calculate current density, we use the relation and insert Eq. ( 29 ) to Eq.…”

Section: Methodsmentioning

confidence: 99%

Investigating valley-dependent current generation due to asymmetric energy dispersion for charge-transfer from a quantum dot to single-walled carbon nanotube

Charoenpakdee

Suntijitrungruang

Boonchui

2023

Sci Rep

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Single-wall carbon nanotubes (SWCNT), which consist of a two-dimensional hexagonal lattice of carbon atoms, possess unique mechanical, electrical, optical and thermal properties. SWCNT can be synthesized in diverse chiral indexes to determine certain attributes. This work theoretically investigates electron transport in different directions along SWCNT. The electron studied in this research transfers from the quantum dot that can possibly move to the right or left direction in SWCNT with different valley-dependent probability. These results show that valley polarized current is present. The valley current in the right and left directions has a composition of valley degrees of freedom where its components (K and K′) are not identical. Such a result can be traced theoretically by certain effects. That firstly is the curvature effect on SWCNT in which the hopping integral between $$\pi $$ π electrons from the flat graphene is altered, and another is curvature-inducing $$\sigma -\pi $$ σ - π mixture. Due to these effects, the band structure of SWCNT is asymmetric in certain chiral indexes leading to the asymmetry of valley electron transport. Our results exhibit that the zigzag chiral indexes is the only type making electron transport symmetrical that is different to the result from the other chiral index types which are the armchair and chiral. This work also illustrates the characteristic of the electron wave function propagating from the initial point to the tip of the tube over time, and the current density of the probability in specific times. Additionally, our research simulates the result from the dipole interaction between the electron in QD and the tube that impacts the lifetime of the electron being in QD. The simulation portrays that more dipole interaction encourages the electron transfer to the tube, thereby shortening the lifetime. We as well suggest the reversed electron transfer from the tube to QD that the time duration of such transfer is much less than the opposite transfer owing to the different orbital of the electron’s states. Valley polarized current in SWCNTs may also be used in the development of energy storage devices such as batteries and supercapacitors. The performance and effectiveness of nanoscale devices, including transistors, solar cells, artificial antennas, quantum computers, and nano electronic circuits, must be improved in order to achieve a variety of benefits.

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“…Monolayer h‐BN has large bandgap, however, its second‐order nonlinear susceptibility is only ≈20 pm V −1 . [ 10,38,39 ]…”

Section: Introductionmentioning

confidence: 99%

Robust Type‐II Band Alignment and Stacking‐Controlling Second Harmonic Generation in GaN/ZnO vdW Heterostructure

Zhang,

Qiu,

Zhao

et al. 2023

Laser & Photonics Reviews

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Most traditional 2D materials have small bandgaps, resulting in low laser damage thresholds and limiting their applications in the ultraviolet region. Recently experimentally synthesized 2D GaN and ZnO can be such candidates due to their wide bandgaps, high charge mobilities, and optical transparency. Here, the van der Waals heterostructure GaN/ZnO is predicted that can exhibit both wide bandgap and strong second harmonic generation (SHG) response by compelling simulations. The results show the heterostructure always exhibits type‐II band alignment under all probable stacking configurations. The out‐of‐plane SHG coefficients are up to 90 pm V−1 at 400 nm, comparable to those of MoS2 and MoSe2 and higher than most 3D crystals. Interestingly, the positions are enhanced with localized, symmetric, and stacking‐dependent features in the Brillouin zone. This peculiar momentum space behavior is originated from the relative strength of two distinct mechanisms contributing to the second‐order nonlinear optical (NLO) response, that is, a purely interband transition part and a mixed interband‐intraband contribution. Thus, this study proposes that GaN/ZnO heterostructure may be an efficient and high laser damage thresholds (LDTs) NLO material and an interesting platform for studying NLO optical properties.

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Spin current generation and control in carbon nanotubes by combining rotation and magnetic field

Cited by 7 publications

References 35 publications

Spin density polarization effects in the presence of Coriolis force on ion acoustic waves in quantum plasma

Spin density polarization effects in the presence of Coriolis force on ion acoustic waves in quantum plasma

Investigating valley-dependent current generation due to asymmetric energy dispersion for charge-transfer from a quantum dot to single-walled carbon nanotube

Robust Type‐II Band Alignment and Stacking‐Controlling Second Harmonic Generation in GaN/ZnO vdW Heterostructure

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