Kinetic Study on Channelling of Protons in Metallic Carbon Nanotubes
ZHAO Dan, SONG Yuan-Hong, WANG You-Nian
State Key Laboratory of Materials Modification by Beams, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024
Kinetic Study on Channelling of Protons in Metallic Carbon Nanotubes
ZHAO Dan, SONG Yuan-Hong, WANG You-Nian
State Key Laboratory of Materials Modification by Beams, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024
摘要Based on the kinetic model and the dielectric response theory, a theoretical model is put forward to describe the transport of protons along nanotube axes. With the introduction of electron band structure for different nanotubes like zigzag and armchair nanotubes of metallic properties, the collective excitation of electrons on the cylinders induced by the incident ions is studied, showing several distinct peaks in the curves of the energy loss function. Furthermore, the stopping power and the self-energy are calculated as functions of ion velocities, especially taking into account the influence of damping coefficients. It is conceivable from the results that, in the kinetic formulation, plasmon excitation plays a major role in the stopping. And as the damping increases, the peaks of the stopping power shift to the lower velocities, with the broadening of the plasmon resonance.
Abstract：Based on the kinetic model and the dielectric response theory, a theoretical model is put forward to describe the transport of protons along nanotube axes. With the introduction of electron band structure for different nanotubes like zigzag and armchair nanotubes of metallic properties, the collective excitation of electrons on the cylinders induced by the incident ions is studied, showing several distinct peaks in the curves of the energy loss function. Furthermore, the stopping power and the self-energy are calculated as functions of ion velocities, especially taking into account the influence of damping coefficients. It is conceivable from the results that, in the kinetic formulation, plasmon excitation plays a major role in the stopping. And as the damping increases, the peaks of the stopping power shift to the lower velocities, with the broadening of the plasmon resonance.
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
引用本文:
ZHAO Dan;SONG Yuan-Hong;WANG You-Nian. Kinetic Study on Channelling of Protons in Metallic Carbon Nanotubes[J]. 中国物理快报, 2008, 25(7): 2588-2591.
ZHAO Dan, SONG Yuan-Hong, WANG You-Nian. Kinetic Study on Channelling of Protons in Metallic Carbon Nanotubes. Chin. Phys. Lett., 2008, 25(7): 2588-2591.
2008, Vol. 25 
