Electron transport in double-walled carbon nanotubes
Department of Electrical Engineering, Kun Shan University, Tainan, Taiwan, Republic of China
2 Department of Physics, National Cheng Kung University, Tainan, Taiwan, Republic of China
Revised: 12 October 2007
Published online: 23 November 2007
The transport properties of finite length double-walled carbon nanotubes subject to the influences of a transverse electric field and a magnetic field with varying polar angles are investigated theoretically. The electrical conductance, thermal conductance and Peltier coefficient dependences on the external fields and symmetric configuration are studied in linear response regime. Prominent peak structures of the electrical conductance are predicted when varying the electric field strength. The features of the conductance peaks are found to be strongly dependent on the external fields and the intertube interactions. The heights of the electrical and thermal conductance peaks display the quantized behavior, while those of the Peltier coefficient do not. The conductance peaks are found to be broadened by the finite temperature.
PACS: 61.46.-w – Nanoscale materials / 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 85.35.Kt – Nanotube devices
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007