Electronic Transport through Carbon Nanotubes: Effects of Structural Deformation and Tube Chirality

Maiti, Amitesh; Svizhenko, A.; Anantram, M. P.

doi:10.1103/physrevlett.88.126805

Cited by 211 publications

(143 citation statements)

References 20 publications

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“…Theoretical studies [6,7,8] have also been performed to help exploring the correlation between the structural perturbation and the change of electronic properties. However, in general, the experiments are done in a guess-work manner, because it is a prior unknown how a given structural perturbation would change the electronic properties.…”

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confidence: 99%

Metal-to-Semiconductor Transition in Squashed Armchair Carbon Nanotubes

et al. 2003

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We investigate electronic transport properties of the squashed armchair carbon nanotubes, using tight-binding molecular dynamics and Green's function method. We demonstrate a metal-tosemiconductor transistion while squashing the nanotubes and a general mechanism for such transistion. It is the distinction of the two sublattices in the nanotube that opens an energy gap near the Fermi energy. We show that the transition has to be achieved by a combined effect of breaking of mirror symmetry and bond formation between the flattened faces in the squashed nanotubes.

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confidence: 99%

Metal-to-Semiconductor Transition in Squashed Armchair Carbon Nanotubes

et al. 2003

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“…Taking these facts into consideration, to ensure the stable performance of CNT-based electronic devices and sensors, including our proposed CNT-based strain sensor, the prediction of electronic properties of CNTs under strain is indispensable. The effect of local strain field, however, remains unclear despite previous studies 16,[21][22][23] because of the lack of systematic studies on the effect of radial deformation.…”

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confidence: 95%

Quantitative evaluation of orbital hybridization in carbon nanotubes under radial deformation using π-orbital axis vector

2015

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When a radial strain is applied to a carbon nanotube (CNT), the increase in local curvature induces orbital hybridization. The effect of the curvature-induced orbital hybridization on the electronic properties of CNTs, however, has not been evaluated quantitatively. In this study, the strength of orbital hybridization in CNTs under homogeneous radial strain was evaluated quantitatively. Our analyses revealed the detailed procedure of the change in electronic structure of CNTs. In addition, the dihedral angle, the angle between π-orbital axis vectors of adjacent atoms, was found to effectively predict the strength of local orbital hybridization in deformed CNTs.

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“…In order to explain the differences in conductance drops of the armchair (6, 6) and the zigzag (12, 0) tubes as a function of strain, we turn to the literature where a considerable amount of theoretical work already exists [56][57][58][59][60][61]. An important result [60] is Researchers are also beginning to explore electrical response of squashed CNTs [62][63][64], where sp 3 coordination is a possibility.…”

Section: Application Examples 41 Electromechanical Sensorsmentioning

confidence: 99%