Persistent orbital degeneracy in carbon nanotubes

Persistent orbital degeneracy in carbon nanotubes
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碳纳米管中的持续轨道简并

DOI:
10.1103/physrevb.74.155431
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发表时间:
2005
期刊:
影响因子:
3.7
通讯作者:
G. Finkelstein
G. Finkelstein
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
A. Makarovski;L. An;Jie Liu;G. Finkelstein

文献摘要

被引文献

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碳纳米管量子点中的量子力学轨道在大量态上是双简并的。我们认为,这个实验观察表明,电子被反射的纳米管金属接触处没有模式混合。发现占据一对简并轨道(“壳层”)的两个电子从零磁场开始形成三重态。最后,我们观察到意想不到的低能量激发完全填充的四电子壳层。
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.