Work Function of Single-wall Silicon Carbide Nanotube

Abstract

Using first-principles calculations, we study the work function of single wall silicon carbide nanotube (SiCNT). The work function is found to be highly dependent on the tube chirality and diameter. It increases with decreasing the tube diameter. The work function of zigzag SiCNT is always larger than that of armchair SiCNT. We reveal that the difference between the work function of zigzag and armchair SiCNT comes from their different intrinsic electronic structures, for which the singly degenerate energy band above the Fermi level of zigzag SiCNT is specifically responsible. Our finding offers potential usages of SiCNT in field-emission devices.

3 pages, 3 figures

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• Theory of non-equilibrium thermoelectric effects in nanoscale junctions
• Tunable bandgap and magnetic ordering by adsorption of molecules on graphene
• Contact Atomic Structure and Electron Transport Through Molecules
• Spin-dependent electronic structure of transition-metal atomic chains adsorbed on single-wall carbon nanotubes