Electronic specific heat of single-walled carbon nanotubes

2019-10-10 11:12:31

single magnetic heat electronic specific

责任者: Lin, M.F.;Shung, K.W.-K. 单位: Dept. of Phys., Nat. Tsing Hua Univ., Hsinchu, Taiwan 来源出处: Physical Review B (Condensed Matter)(Phys. Rev. B, Condens. Matter (USA)),1996/07/15,54(4):2896-900 摘要: The electronic structure of single-walled carbon nanotubes is calculated by the tight-binding model. A single-walled carbon nanotube could drastically change from a metal to a semiconductor or vice versa during the variation of magnetic flux. The low-temperature electronic specific heat thus exhibits the rich temperature and magnetic-flux dependence. There are four kinds of temperature dependence in the presence of the magnetic field, mainly due to the interaction between spin and magnetic field. Moreover, the magnetic-flux-dependent specific heat exhibits the pronounced oscillatory behavior including asymmetric two-peak structures. These structures strongly depend on the characteristics of the subbands nearest the Fermi level 关键词: electronic structure;fullerenes;nanostructured materials;specific heat;tight-binding calculations;electronic specific heat;single-walled C nanotubes;electronic structure;tight-binding model;magnetic-flux-dependent specific heat;asymmetric two-peak structures;Fermi level;C