Phonons and electron-phonon scattering in carbon nanotubes

2019-12-06 07:53:38

structure electron band scattering phonon

责任者: Suzuura, H.;Ando, T. 单位: Inst. for Solid State Phys., Univ. of Tokyo, Chiba, Japan 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev, B, Condens, Matter Mater. Phys. (USA)),2002/06/15,65(23):235412-1 摘要: Electron-phonon scattering is studied within an effective-mass theory. A continuum model for acoustic phonons is introduced and electron-phonon interaction due to modification of band structure is derived as well as a normal deformation potential. In a metallic nanotube, the deformation potential does not participate in electron scattering and a metallic nanotube becomes nearly a one-dimensional ballistic conductor even at room temperature. A resistivity determined by small band-structure interaction depends on the chirality at low temperatures. A magnetic field perpendicular to the axis induces electron scattering by the deformation potential, giving rise to huge positive magnetoresistance 关键词: band structure;carbon nanotubes;chirality;effective mass;electrical resistivity;electron-phonon interactions;magnetoresistance;carbon nanotubes;electron-phonon scattering;effective-mass theory;continuum model;acoustic phonons;band structure;normal deformation potential;metallic nanotube;electron scattering;one-dimensional ballistic conductor;room temperature;resistivity;small band-structure interaction;chirality;low temperatures;magnetic field;huge positive magnetoresistance;C