通过交叉电场和磁场使纳米管带弯曲
Accessing nanotube bands via crossed electric and magnetic fields
摘要：
研究了单壁扶手椅型碳纳米管在横向于管轴的相互正交的电场和磁场作用下的传导电子性质。我们发现，该领域引起的不对称的分散在右和左移动的电子沿管以及带相关的相互作用。我们预测，这样的纳米管系统将表现出自旋-带-电荷分离和带依赖的隧穿态密度。我们表明，在量子点的限制，字段用于完全调整的量子态的电子添加到纳米管。对于每个预测的影响，我们提供了与实验相关的示例和估计。
英文摘要：
We investigate the properties of conduction electrons in single-walled armchair carbon nanotubes in the presence of mutually orthogonal electric and magnetic fields transverse to the tube's axis. We find that the fields give rise to an asymmetric dispersion in the right- and left-moving electrons along the tube as well as a band-dependent interaction. We predict that such a nanotube system would exhibit spin-band-charge separation and a band-dependant tunneling density of states. We show that in the quantum dot limit, the fields serve to completely tune the quantum states of electrons added to the nanotube. For each of the predicted effects, we provide examples and estimates that are relevant to experiment.
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