Nonlinear Transport and Heat Dissipation in Metallic Carbon Nanotubes

Kuroda, Marcelo A.; Cangellaris, A.C.; Leburton, Jean Pierre

doi:10.1103/physrevlett.95.266803

Cited by 96 publications

(110 citation statements)

References 20 publications

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“…[12], but including heat loss to the substrate and excluding the OP non-equilibrium effect. We have found the latter is not required to reproduce the electrical characteristics of SWNTs on insulating substrates, as have other recent studies based on solutions of the Boltzmann Transport Equation [13]. This does not rule out some degree of OP non-equilibrium in nanotubes on substrates [39], but it does imply that OP non-equilibrium appears much weaker in SWNTs on substrates compared to freely suspended SWNTs [12].…”

Section: Coupled Electro-thermal Transportmentioning

confidence: 40%

“…Despite their high thermal conductivity, the thermal conductance of carbon nanotubes is relatively low owing to their small diameter and thermal boundary resistance with the environment [10,11]. This implies that significant self-heating of SWNTs occurs under high current conditions [12,13], a fact often overlooked in earlier studies of high bias transport in SWNTs on insulating substrates [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Electrical and thermal transport in metallic single-wall carbon nanotubes on insulating substrates

Pop

Mann

Goodson

et al. 2007

Journal of Applied Physics

329

307

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We analyze transport in metallic single-wall carbon nanotubes (SWNTs) on insulating substrates over the bias range up to electrical breakdown in air. To account for Joule self-heating, a temperature-dependent Landauer model for electrical transport is coupled with the heat conduction equation along the nanotube.The electrical breakdown voltage of SWNTs in air is found to scale linearly with their length, approximately as 5 V/µm; we use this to deduce a thermal conductance between SWNT and substrate g ≈ 0.17 ± 0.03 WK -1 m -1 per tube length, which appears limited by the SWNT-substrate interface rather than the thermal properties of the substrate itself. We examine the phonon scattering mechanisms limiting electron transport, and find the strong temperature dependence of the optical phonon absorption rate to have a remarkable influence on the electrical resistance of micron-length nanotubes. Further analysis reveals that unlike in typical metals, electrons are responsible for less than 15% of the total thermal conductivity of metallic nanotubes around room temperature, and this contribution decreases at high bias or higher temperatures. For interconnect applications of metallic SWNTs, significant self-heating may be avoided if power densities are limited below 5 µW/µm, or if the SWNT-surrounding thermal interface is optimized.Contact: epop@stanfordalumni.org, hdai@stanford.edu 2

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Section: Coupled Electro-thermal Transportmentioning

confidence: 40%

Section: Introductionmentioning

confidence: 99%

Electrical and thermal transport in metallic single-wall carbon nanotubes on insulating substrates

Pop

Mann

Goodson

et al. 2007

Journal of Applied Physics

329

307

View full text Add to dashboard Cite

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“…Joule heating is shown to be responsible for the current saturation as well as for the negative differential conductance in supported and suspended metallic NTs, respectively. 28,29 It is evident from Fig. 3 that temperature increases with increasing applied voltage.…”

Section: Resultsmentioning

confidence: 90%

Electrical characteristics of multiwalled carbon nanotube arrays and influence of pressure

Singh

2012

AIP Advances

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We have investigated the current-voltage characteristics of carbon nanotube arrays and shown that the current through the arrays increases rapidly with applied voltage before the breakdown occurs. Simultaneous measurements of current and temperature at one end of the arrays suggest that the rapid increase of current is due to Joule heating. The current through the array and the threshold voltage are found to increase with decreasing pressure

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“…36,37 Researchers have been able to reproduce on-substrate current-voltage (I-V ) characteristics by including a simple Joule heating model, without the assumption of phonon nonequilibrium, 36,37 although some arguments to the contrary also exist. 38 The presence of nonequilibrium hot phonons in tubes on solid substrates is less certain than for suspended SWNTs (see section below), since hot OP phonons may couple with and decay into the substrate modes.…”

Section: High Field Transport Properties: Nanotubes On Substratesmentioning

confidence: 99%

Electrical Transport Properties and Field Effect Transistors of Carbon Nanotubes

Dai

Javey

Pop

et al. 2006

NANO

159

120

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This paper presents a review on our recent work on carbon nanotube field effect transistors, including the development of ohmic contacts, high-κ gate dielectric integration, chemical functionalization for conformal dielectric deposition and pushing the performance limit of nanotube FETs by channel length scaling. Due to the importance of high current operations of electronic devices, we also review the high field electrical transport properties of nanotubes on substrates and in freely suspended forms. Owing to their unique properties originating from their crystalline 1D structure and the strong covalent carbon-carbon bonding configuration, carbon nanotubes are highly promising as building blocks for future electronics. They are found to perform favorably in terms of ON-state current density as compared to the existing silicon technology, owing to their superb electron transport properties and compatibility with high-κ gate dielectrics. Future directions and challenges for carbon nanotube-based electronics are also discussed.

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Nonlinear Transport and Heat Dissipation in Metallic Carbon Nanotubes

Cited by 96 publications

References 20 publications

Electrical and thermal transport in metallic single-wall carbon nanotubes on insulating substrates

Electrical and thermal transport in metallic single-wall carbon nanotubes on insulating substrates

Electrical characteristics of multiwalled carbon nanotube arrays and influence of pressure

Electrical Transport Properties and Field Effect Transistors of Carbon Nanotubes

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