%0 Journal Article
%T The effects of axial magnetic field on electronic properties of carbon nanotubes<br>轴向磁场对碳纳米管电子性质的影响
%A Zhang Zhu-Hua
%A Guo Wan-Lin
%A Guo Yu-Feng
%A <br>张助华
%A 郭万林
%A 郭宇锋
%J 物理学报
%D 2006
%I 
%X The effects of the external magnetic field on the energy gap of carbon nanotubes were investigated by using the tight-bonding method. It was found that, under the applied magnetic field, the peak of energy gap induced by magnetic field and the slope of energy gap versus magnetic field depend on their diameters tightly; when tubes with the same diameters are used, the metal type tubes have the highest energy gap peak. Furthermore, under the magnetic field, the density of states of carbon nanotubes near the Fermi level are also calculated, showing that the Van Hove singularities will exhibit a periodic phenomenon of splitting, moving and merging. Our calculations meet the results from Green's function method, so they are reasonable.
%K magnetic field
%K carbon nanotubes
%K tight-bonding method
%K Van Hove singularities<br>磁场
%K 碳纳米管
%K 紧束缚法
%K 范霍夫奇异点
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=69253FEE7D605066&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=59906B3B2830C2C5&sid=5B783D6454827C30&eid=A107CF7D2BAB8CC9&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=24