期刊
JOURNAL OF APPLIED PHYSICS
卷 107, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3280035
关键词
band theory; carbon nanotubes; electrical conductivity; electron density; elemental semiconductors; Fermi level; graphene
The electrical conductivity of carbon nanotubes varies, depending on the temperature and the radius and pitch of the sample. In majority cases, the resistance decreases with increasing temperature, suggesting a thermally activated process. The standard band theory based on the Wigner-Seitz cell model predicts a gapless semiconductor, which does not account for the thermal activation. A new band model in which an electron (hole) has a carbon hexagon size for graphene is proposed. The normal charge carriers in graphene transport are electrons and holes. The electrons (holes) wavepackets extend over the carbon hexagon and carry the charges -e(+e). Electrons or holes thermally activated are shown to generate the observed temperature behavior of the conductivity in the nanotubes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据