Electron transport in telescoping carbon nanotubes

Kim, D.-H.; Chang, Kee Joo

doi:10.1103/physrevb.66.155402

Cited by 59 publications

(50 citation statements)

References 28 publications

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“…After burning off the outer shells over the platinum nanowire ͑in addition, the MWNT may also be pulled out to open the Pt wire͒, we force the current to flow through the metallic wire that serves as a spin-sink and a rotor. It has recently been calculated that the conductance may rapidly oscillate due to quantum interference effects as we change the overlap between two nanotube shells, [27][28][29] but disorder strongly enhances the intershell conductance, consistent with experiments. 30 The situation with not too high polarization of the MWNT connection to a ferromagnet 31 ͑P ϳ 0.01͒ has a tendency to improve with recent experiments reporting TMR= 5% ͑P ϳ 0.2͒.…”

Section: Spin-transfer Nanomotorsupporting

confidence: 80%

Current-driven ferromagnetic resonance, mechanical torques, and rotary motion in magnetic nanostructures

2007

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We study theoretically the detection and possible utilization of electric current-induced mechanical torques in ferromagnetic-normal-metal heterostructures generated by spin-flip scattering or the absorption of transverse spin currents by a ferromagnet. To this end, we analyze the dc voltage signals over a spin valve driven by an ac current. In agreement with recent studies, this "rectification," measured as a function of ac frequency and applied magnetic field, contains important information on the magnetostatics and magnetodynamics. Subsequently, we show that the vibrations excited by spin-transfer to the lattice can be detected as a splitting of the dc voltage resonance. Finally, we propose a concept for a spin-transfer-driven electric nanomotor based on integrating metallic nanowires with carbon nanotubes, in which the current-induced torques generate a rotary motion.

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Section: Spin-transfer Nanomotorsupporting

confidence: 80%

Current-driven ferromagnetic resonance, mechanical torques, and rotary motion in magnetic nanostructures

2007

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“…[143][144][145][146] In double-wall CN's with an infinitely long outer tube and a finite inner tube and in telescoping tubes, in particular, antiresonance of conducting channels with quasi-localized states can cause large conductance oscillations. 146,147) In actual multi-wall nanotubes, however, the lattice structure of walls are incommensurate with each other and therefore the results for commensurate tubes mentioned above are inapplicable. There have been reported several numerical studies of electronic states 148,149) and transport properties.…”

Section: Multi-wall Nanotubesmentioning

confidence: 99%

Theory of Electronic States and Transport in Carbon Nanotubes

2005

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A brief review is given of electronic and transport properties of carbon nanotubes obtained mainly in a kÁp scheme. The topics include a giant Aharonov-Bohm effect on the band gap and a Landau-level formation in magnetic fields, magnetic properties, interaction effects on the band structure, optical absorption spectra, and exciton effects. Transport properties are also discussed including absence of backward scattering except for scatterers with a potential range smaller than the lattice constant, its extension to multi-channel cases, a conductance quantization in the presence of short-range and strong scatterers such as lattice vacancies, and transport across junctions between nanotubes with different diameters. A continuum model for phonons in the long-wavelength limit and the resistivity determined by phonon scattering are reviewed as well.

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“…It has been theoretically predicted that the transmission probability of the electrons for an interlayer of the double wall nanotube is varied from 0 to 1 at zero temperature depending on their chirality and the electron energy, even when their overlap is a few angstrom [22]. On the other hand, in our experiment, there are 5∼10 layers with a wide variety of chiralities between the outermost layer and the inner layer for the sliding.…”

Section: Electrical Conduction During Slidingmentioning

confidence: 62%

Mechanical and Electrical Properties of Multiwall Nanotube under Interlayer Sliding

Akita

Nakayama

2005

e-J. Surf. Sci. Nanotechnol.

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We have successfully measured the sliding force for an interlayer of individual multiwall carbon nanotubes using a combination of a well-controlled electrical breakdown process and a manipulation process using a scanning electron microscope. A sliding force of ∼4 nN for an inner layer diameter of 5 nm is maintained constant during a sliding process. This result agrees well with the theoretical calculation. This agreement indicates that the layered structure exhibits ideal characteristics even after the electrical breakdown process. We have also proposed nanoscale variable resistors using the sliding mechanism of the interlayer of individual multiwall carbon nanotubes. The two-terminal resistance of the processed nanotube increases exponentially with the sliding distance under a low bias voltage and is proportional to the sliding distance under a high bias voltage. The variation of the resistance under the low bias voltage can be explained as a one dimensional localized system, with a characteristic localization length around 840 nm. On the contrary, the sliding nanotube acts as the diffusive conductor under a high bias voltage.

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Electron transport in telescoping carbon nanotubes

Cited by 59 publications

References 28 publications

Current-driven ferromagnetic resonance, mechanical torques, and rotary motion in magnetic nanostructures

Current-driven ferromagnetic resonance, mechanical torques, and rotary motion in magnetic nanostructures

Theory of Electronic States and Transport in Carbon Nanotubes

Mechanical and Electrical Properties of Multiwall Nanotube under Interlayer Sliding

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