文献类型：期刊文献

英文题名：Asymmetric spin-orbit coupling in single-walled carbon nanotubes

作者：Zhou, Jian[1,2,3];Liang, Qifeng[4];Dong, Jinming[1,2]

机构：[1]Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China;[2]Nanjing Univ, Natl Lab Solid State Microstruct, Grp Computat Condensed Matter Phys, Nanjing 210093, Peoples R China;[3]Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Peoples R China;[4]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2009

卷号：79

期号：19

外文期刊名：PHYSICAL REVIEW B

收录：SCI-EXPANDED(收录号：WOS:000266501300126)、、Scopus(收录号：2-s2.0-67649394616)、WOS

基金：This work was supported by the Natural Science Foundation of China under Grant No. 10874067 and also from a Grant for State Key Program of China through Grants No. 2004CB619004 and No. 2006CB921803. J. Z. was also supported by the China Postdoctoral Science Foundation funded project and the Jiangsu Planned Projects for Postdoctoral Research Funds.

语种：英文

外文关键词：ab initio calculations; band structure; carbon nanotubes; chirality; spin-orbit interactions; tight-binding calculations

外文摘要：The spin-orbit coupling (SOC) of single-walled carbon nanotube (SWNT) has been studied using both the first-principles and tight-binding (TB) methods. It is found that the curvature-induced sigma-pi coupling in the SWNTs always causes a more strong SOC in their pi bonding states than their pi(*) antibonding ones. And a microscopic mechanism has been proposed to satisfactorily explain the experimental observation that the SOC-induced band splitting in the SWNTs is different for electrons and holes [Nature (London) 452, 448 (2008)], which cannot be accounted for by the present theories. Finally, a SOC's family behavior of the SWNTs is also found, showing that their SOC depends on both the tube's chirality and family type.