Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China;
Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China;
Interdisciplinary Center of Theoretical Studies and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China;
Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China;
Interdisciplinary Center of Theoretical Studies and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China;
Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China;
Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China;
phonon spectrum; nanotube; boron nitride;