Charge Carrier Transport Properties in Single-Walled Carbon Nanotube Fibers

V.K. Ksenevich a, D. Seliuta b, Z. Martūnas b, I. Kašalynas b, G. Valušis b, J. Galibert c, M.E. Kozlov d and V.A. Samuilov e a Department of Physics, Belarus State University, Nezalezhnasti av. 4, 220030 Minsk, Belarus b Semiconductor Physics Institute, A. Goštauto 11, LT-01108 Vilnius, Lithuania c Laboratoire de Physique de la Matière Condensée, S.N.C.M.P.-I.N.S.A., 135, Av. de Rangueil, 31077 Toulouse CEDEX 4, France d The Nano Tech Institute, University of Texas at Dallas, P.O. Box 830688, BE26, Richardson, TX 75083-0688, USA e Department of Materials Science, State University of New York at Stony Brook, N.Y. 11794-2275, USA

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Received: 26 08 2007;

Transport properties via temperature dependences of sample resistance R(T) and influence of microwave field of 10 GHz on the conductivity of the single-walled carbon nanotubes fibers are investigated. The R(T) dependences studied within 4.2-300 K can be well approximated by the Mott law for 3D variable range hopping below T=80 K and by typical law for fluctuation-induced tunnelling model within the temperature range 80-300 K. We associate the observed increase in the conductivity with microwave power by increase in hopping probability of the charge carriers between single-walled carbon nanotubes.

DOI: 10.12693/APhysPolA.113.1039 PACS numbers: 73.63.Fg