Brancus D E N, Ion L
Faculty of Physics, University of Bucharest, street Atomistilor no. 405, POB MG-11, 077125, Magurele-Ilfov, Romania.
J Phys Condens Matter. 2009 Dec 2;21(48):485301. doi: 10.1088/0953-8984/21/48/485301. Epub 2009 Oct 30.
Dispersion laws of the full optical phonon spectrum of a nanotube made of würtzite-type materials as well as the corresponding Fröhlich electron-phonon interaction terms are derived and studied within the framework of the dielectric continuum model for a uniaxial crystal. The coupling coefficients describing electron-phonon interaction are obtained in an analytical closed form, depending on the dispersion law of the involved phonon branch. We present and discuss results of numerical calculations of optical phonon spectrum and Fröhlich coupling coefficients for some chosen würtzite AlN nanotubes. Observed features, induced by the anisotropy of würtzite-type materials, are discussed.
在单轴晶体的介电连续体模型框架内，推导并研究了由纤锌矿型材料制成的纳米管的全光学声子谱的色散定律以及相应的弗罗利希电子 - 声子相互作用项。描述电子 - 声子相互作用的耦合系数以解析闭合形式获得，这取决于所涉及声子分支的色散定律。我们给出并讨论了一些选定的纤锌矿型氮化铝纳米管的光学声子谱和弗罗利希耦合系数的数值计算结果。讨论了由纤锌矿型材料的各向异性引起的观测特征。
