Persistent orbital degeneracy in carbon nanotubes
Persistent orbital degeneracy in carbon nanotubes
复制标题
碳纳米管中的持续轨道简并
DOI:
10.1103/physrevb.74.155431
复制
发表时间:
2005
影响因子:
3.7
通讯作者:
G. Finkelstein
中科院分区:
文献类型:
--
作者:
A. Makarovski;L. An;Jie Liu;G. Finkelstein
The quantum-mechanical orbitals in carbon nanotube quantum dots are doubly degenerate over a large number of states. We argue that this experimental observation indicates that electrons are reflected without mode mixing at the nanotube-metal contacts. Two electrons occupying a pair of degenerate orbitals (``shell'') are found to form a triplet state starting from zero magnetic field. Finally, we observe unexpected low-energy excitations at complete filling of a four-electron shell.