Electronic conduction in multi-walled carbon nanotubes: role of intershell coupling and incommensurability

Roche, Stephan; Triozon, François; Rubio, Ángel; Mayou, Didier

doi:10.1016/s0375-9601(01)00330-9

Cited by 51 publications

(22 citation statements)

References 31 publications

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“…In addition to Yoon et al 29 also other theoretical papers have calculated the intershell resistance using tunneling as the only mechanism. [37][38][39][40][41][42][43][44][45] For example Roche and co-workers [37][38][39] have considered the time evolution of a wave packet initially on the outer tube in a disorder-free MWCNT including tunneling in a tight-binding approximation. This is not in contrast to Ref.…”

Section: B Intershell Resistance In Mwcnt'smentioning

confidence: 99%

Intershell resistance in multiwall carbon nanotubes: A Coulomb drag study

2005

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Section: B Intershell Resistance In Mwcnt'smentioning

confidence: 99%

Intershell resistance in multiwall carbon nanotubes: A Coulomb drag study

2005

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“…Furthermore, according to Ref. 16 the conductance of a ͑metal-lic͒ MWNT with intershell coupling also depends on whether neighboring shells are commensurate or incommensurate. Based on these two points, the conductance of a MWNT has a power-law dependence on its length L given by…”

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confidence: 99%

“…16 Furthermore, the case ϭ1 implies that the MWNT consists of commensurate shells. 16 Fitting the data on G exp given in the table in Fig. 1͑b͒ with the aid of Eq.…”

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confidence: 99%

“…͑1͒ yields B-MWNT Ϸ0.49Ϯ0.02. This value indicates that the B-MWNTs have scattering centers that originate from structural or topological defects and the likely geometrical incommensurability of neighboring shells 16 such that diffusive charge transport is apparent. In consequence, the B-MWNT is not expected to show strong LL-like features; instead a more 2D ͑i.e., Fermi-liquid-like͒ character of the electron system should be apparent.…”

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confidence: 99%

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Role of disorder on transport in boron-doped multiwalled carbon nanotubes

et al. 2003

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Electrical transport measurements on boron-doped multiwalled carbon nanotubes deposited on top of predefined electrode patterns have been performed. The temperature dependence of the conductance reveals through two-point configuration, the appearance of a zero-bias anomaly which was found to be not compatible with the existence of a Luttinger-liquid-like state in the doped multiwalled carbon nanotubes. The experimental findings indicate that, in order to properly interpret the charge transport properties of multiwalled carbon nanotubes, the doping as well as the energy window in which the experiments are performed are crucial points. DOI: 10.1103/PhysRevB.67.041401 PACS number͑s͒: 73.63.Fg, 72.80.Rj, 73.22.Lp Multiwalled carbon nanotubes ͑MWNTs͒, in contrast to single-walled carbon nanotubes ͑SWNTs͒, consist of a number of stacked-in shells and have a diameter typically of tens of nm's which is one order of magnitude larger than for SWNTs. Despite these differences, MWNTs are often regarded as one-dimensional ͑1D͒ systems, with respect to their electronic properties in the same manner as SWNTs. SWNTs are expected to behave as quasi 1D molecular wires with large mean free paths ͓typically 1 m ͑Ref. 1͔͒, so that ballistic charge transport is observable.2-6 As a direct consequence of the 1D-conducting behavior of carbon nanotubes, strong Coulomb interaction effects are expected that imply a breakdown of the Fermi-liquid theory leading to a Luttingerliquid response characterized by a pronounced power-law suppression of the transport current and density of states. 7The situation for MWNTs is more complex. Earlier experiments 8 found evidence of electron scattering and the transport appeared diffusive rather than ballistic. However, experiments done by dipping a MWNT in a liquid metal 5 show ballistic transport and the ability to carry large electrical currents. These observations suggest that the electrons are well decoupled from the underlying lattice, that is, only a weak electron-phonon interaction is apparent, similar to SWNTs.9 At low temperatures several contradictory observations in the electronic transport properties of MWNTs have been made: magnetotransport data could be successfully interpreted by the Altshuler-Aronov-Spivak effect 10 and in the framework of weak-localization theory, 11 which both point toward a disordered electronic state with 2D character at low temperatures. On the other hand a zero-bias anomaly ͑ZBA͒ in the conductance has been reported. 12 This could be interpreted by the existence of a Luttinger-liquid ͑LL͒-like state which requires a 1D electronic system with repulsive interaction between the electrons.In the present work we report on temperature-dependent electronic transport measurements on boron ͑B͒ -doped MWNTs ͑B-MWNTs͒ with approximately 1% B content which were produced by the arc-discharge method. The use of B-MWNTs aims toward the investigation of the intershellcoupling between neighboring shells, dimensionality of the electron system and the degree of disorder introduced...

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“…At low energy, nonzero intershell coupling occurs in c-DWCNTs while intershell coupling vanishes in i-DWCNTs. [20][21][22][23][24] As explained theoretically in Ref. 25, nonzero intershell coupling causes eightelectron periodicity in the stability diagram of c-DWCNT while four-electron periodicity, similar to that in SWCNT QDs, is observed in case of zero intershell coupling in i-DWCNT.…”

Section: Introductionmentioning

confidence: 76%

Electronic transport properties of double-wall carbon nanotubes

et al. 2011

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We studied the discretized electronic spectra of double-wall carbon nanotube (DWCNT) quantum dots (QDs) in the Coulomb-blockade regime. At low temperatures, the stability diagrams show a clear and regular eight-electron periodicity, which is due to the nonzero intershell couplings. Furthermore, the electronic charging energy, the energy level spacing, and the intershell coupling strengths of the measured DWCNT QDs were determined.

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Electronic conduction in multi-walled carbon nanotubes: role of intershell coupling and incommensurability

Cited by 51 publications

References 31 publications

Intershell resistance in multiwall carbon nanotubes: A Coulomb drag study

Intershell resistance in multiwall carbon nanotubes: A Coulomb drag study

Role of disorder on transport in boron-doped multiwalled carbon nanotubes

Electronic transport properties of double-wall carbon nanotubes

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