The low-frequency magnetoplasmons of armchair carbon nanotubes are investigated by the random phase approximation. The dependence on the magnetic flux (φ), the direction (α) of magnetic field, and the temperature (T) is novel. Each nanotube exhibits one interband magnetoplasmon at low temperature, when the magnetic field is not perpendicular to the nanotube axis. The plasmon frequency decreases (increases) with α (φ), while the strength of plasmon exhibits the opposite behavior. One interband and intraband magnetoplasmon can exist at α = 90°, and it is almost the same with that in the absence of φ. The temperature can induce one intraband magnetoplasmon and reduce the frequency of the interband magnetoplasmon. The new plasmon is absent at low T, or at high T and large α. The T-dependence is negligible for the interband and intraband magnetoplasmon at a = 90° or the plasmon at φ = 0.
|Number of pages||7|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - 2003 May 5|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)