Energy loss of the electron system in individual single-walled carbon nanotubes

Details Energy loss of the electron system in individual single-walled carbon nanotubes Energy loss of the electron system in individual single-walled carbon nanotubes

2010-10-04

arxiv.org/abs/1010.0660v1

Nano Lett. 10, 4538 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, including supporting information; to appear in Nano Letters

Scientific paper

We characterize the energy loss of the non-equilibrium electron system in individual metallic single-walled carbon nanotubes at low temperature. Using Johnson noise thermometry, we demonstrate that, for a nanotube with ohmic contacts, the dc resistance at finite bias current directly reflects the average electron temperature. This enables a straightforward determination of the thermal conductance associated with cooling of the nanotube electron system. In analyzing the temperature- and length-dependence of the thermal conductance, we consider contributions from acoustic phonon emission, optical phonon emission, and hot electron outdiffusion.

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