Electronic and structural properties of carbon nanotubes modulated by external strain

Su, Wan-Sheng

doi:10.1063/1.4812478

Cited by 7 publications

(3 citation statements)

References 35 publications

(41 reference statements)

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“…1a we show the calculated band structure of the perfect CNT (7,7). It qualitatively coincides with the band structure given in the paper [3]. In the vicinity of the Fermi level at ∼2 eV DOS is nonzero and almost constant.…”

Section: Resultssupporting

confidence: 72%

Optical properties of defective carbon nanotube (7,7)

Созыкин¹,

Бескачко²

2018

Nanosystems: Phys. Chem. Math.

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The current article presents the results of a study of the effect of single-walled carbon nanotubes carcass defects on their electronic structures and optical properties. The study was carried out using an ab-initio quantum mechanical approach: the pseudo-potential method in the density functional theory (DFT) framework in the local density approximation. It is shown that the defects of a single or double vacancy, and StoneWales change the absorption spectrum of nanotubes. This can be expressed in the appearance of absorption in the low-energy region and in the smearing of the absorption peaks corresponding to electron transitions between Van Hove singularities near the Fermi energy.

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Section: Resultssupporting

confidence: 72%

Optical properties of defective carbon nanotube (7,7)

Созыкин¹,

Бескачко²

2018

Nanosystems: Phys. Chem. Math.

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“…Recently, there are extensive concerns on tuning electronic or transport properties via strains for ZnO, carbon nanotube, graphene, MoS

_{2}

, etc. . In the case of ZnO, the transport properties of ZnO nanowires (), ZnO nanotube (), and bulk ZnO () coupled with metal electrodes, have been widely studied in the recent years.…”

Section: Introductionmentioning

confidence: 99%

Strain-modulated transport properties of Cu/ZnO-nanobelt/Cu nanojunctions

Sun

Wang

et al. 2015

Phys. Status Solidi B

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The transport properties of Cu/ZnO‐nanobelt/Cu nanostructures under uniaxial strains were studied using first‐principles calculations, with emphasis on the interfacial contacts. The conductivity G is very sensitive to strain, and it decreases linearly when strain varied from compression to tension, and the piezoresistive gauge factors (GFs) of ZnO nanobelts in non‐polarized direction are 5.66 and 4.29 for compressive (ϵ=−0.05) and tensile strain (ϵ=0.05), respectively. As shown in local density of states (LDOS), the number of carriers nearby the Fermi level decreased obviously when the strains changed from compression to tension, which could be used to explain the linearly decreased conductance. In terms of the transferred interfacial charge and potential profiles, the energy barriers between Cu and ZnO nanobelts could be reduced by strains. These results could help to understand the physics in the strain‐induced metal/ZnO contacts and be used to modulate effectively the performances of ZnO nanodevices.

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“…One avenue that has been explored to alter the intrinsic properties of nanotubes is the introduction of strain. The effects of strain on the elastic, structural, and electronic properties of carbon nanotubesincluding band gap and electron conductance-have been extensively studied [50][51][52][53][54][55][56]. Many uses have been suggested for strained nanotubes including strain sensors and field-effect transistors [57,58].…”

Section: Introductionmentioning

confidence: 99%

Strain-modified RKKY interaction in carbon nanotubes

et al. 2015

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For low-dimensional metallic structures, such as nanotubes, the exchange coupling between localized magnetic dopants is predicted to decay slowly with separation. The long-range character of this interaction plays a significant role in determining the magnetic order of the system. It has previously been shown that the interaction range depends on the conformation of the magnetic dopants in both graphene and nanotubes. Here we examine the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in carbon nanotubes in the presence of uniaxial strain for a range of different impurity configurations. We show that strain is capable of amplifying or attenuating the RKKY interaction, significantly increasing certain interaction ranges, and acting as a switch: effectively turning on or off the interaction. We argue that uniaxial strain can be employed to significantly manipulate magnetic interactions in carbon nanotubes, allowing an interplay between mechanical and magnetic properties in future spintronic devices. We also examine the dimensional relationship between graphene and nanotubes with regards to the decay rate of the RKKY interaction.

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Electronic and structural properties of carbon nanotubes modulated by external strain

Cited by 7 publications

References 35 publications

Optical properties of defective carbon nanotube (7,7)

Optical properties of defective carbon nanotube (7,7)

Strain-modulated transport properties of Cu/ZnO-nanobelt/Cu nanojunctions

Strain-modified RKKY interaction in carbon nanotubes

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