Solid state Properties dependent on chirarity of carbon nanotubes

1. 共振拉曼实验及其相关理论在《物理学》中得到了介绍。启。其中拉曼强度的角度依赖性理论与实验结果吻合较好。结果可以指定具有不同角依赖性的声子模的对称性。通过对单个纳米管进行微拉曼测量，可以了解其手性（n,m）。利用van Hove奇点计算，首次从谐振拉曼测量中得到了金属纳米管和半导体纳米管的（n,m）赋值。这一结果发表在《物理学》杂志上。启Lett.3。态密度的范霍夫奇点与磁场有关。讨论了磁场对共振拉曼光谱的可能修饰。这项研究发表在《物理学》杂志上。启B。

1. Resonant Raman experiment and the related theory are presented in Phys. Rev. Lett. in which the angle dependence of the Raman intensity is in good agreement between theory and experiment. The results can assign the symmetry of phonon modes which give different angular dependence.2. Micro Raman measurement of single nanotube can make it possible to know the chirality (n,m). Using the van Hove singularity calculation, the assignment of (n,m) for metallic and semiconducting nanotube is presented for the first time from the resonant Raman measurement. This result is published in Phys. Rev. Lett.3. The van Hove singularity of density of states is shown to depend on the magnetic field. We discuss the possible modification of resonant Raman spectroscopy by magnetic field. This work is published in Phys. Rev. B.