Thermoelectric power of a single-walled carbon nanotubes strand

• Published in: Journal of physics. Condensed matter Vol. 17; no. 12; pp. 1923 - 1928
• Main Authors: Kong, W J, Lu, L, Zhu, H W, Wei, B Q, Wu, D H
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 30.03.2005; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport in multilayers, nanoscale materials and structures; Exact sciences and technology; Nanotubes; Physics; Luttinger liquid; Singlewalled nanotube; Annealing; Electrical conductivity; Temperature effects; Thermoelectric power; Carbon nanotubes; Power law; Heat treatments; Defects
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/17/12/015

We have investigated the thermoelectric power (TEP) and the electrical conductance of single-walled carbon nanotube (SWNT) strands containing large numbers of aligned crystalline ropes. A linear temperature dependence of TEP and a power-law behaviour of conductance were observed at low temperatures. The TEP increases with temperature at a very large slope of &{sim } 1~micmu {{V~Kˆ{-2}}} K depending on the treatment of high temperature annealing, then decreases with the further increase of temperature. The large slope at low temperatures is interpreted as a property of the Luttinger liquid in the presence of defects.