科研之友
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摘要
The quantum conductance of the electron interferometers composed of the arm chair and metallic zigzag single-walled carbon nanotubes (SWNTs) in an axial magnetic field lower than 100 T has been studied by using the tight-binding approximation and Landauer-Buttiker formula. Quantum conductance oscillation as a function of gate voltage due to Fabry-Perot like electron interference was found. The analytical expressions of the rapid and slow conductance oscillation periods for the arm chair SWNTs have been derived. It is shown that they depend on the magnetic field, gate voltage, and tube length. For the case of the metallic zigzag SWNTs, except rapid conductance oscillation, slow conductance oscillation was also found, which should not exist with out the axial magnetic field.
- 出版日期2010-4-10
- 单位南京工业大学
