Modulation of Thermoelectric Power of Individual Carbon Nanotubes

Abstract

Thermoelectric power (TEP) of individual single walled carbon nanotubes (SWNTs) has been measured at mesoscopic scales using a microfabricated heater and thermometers. Gate electric field dependent TEP-modulation has been observed. The measured TEP of SWNTs is well correlated to the electrical conductance across the SWNT according to the Mott formula. At low temperatures, strong modulations of TEP were observed in the single electron conduction limit. In addition, semiconducting SWNTs exhibit large values of TEP due to the Schottky barriers at SWNT-metal junctions.

arXiv commentto be published in Phys. Rev. Lett

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• Carbon Nanotubes as Schottky Barrier Transistors
• The Electrochemical Carbon Nanotube Field-Effect Transistor
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