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arXiv 0902.4401cond-mat.mes-hall
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碳纳米管中曲率诱导的各向异性自旋轨道分裂

Curvature-induced anisotropic spin-orbit splitting in carbon nanotubes

L. Chico, M. P. Lopez-Sancho, M. C. Munoz

摘要:

我们从理论上探讨了碳纳米管中的自旋轨道相互作用。我们已经发现,除了依赖于手性和直径,自旋轨道耦合的影响是各向异性的:自旋分裂较大的较高的价或较低的电子带取决于特定的管。根据所谓的手征指数,不同的管行为可以分为三个家族。曲率引起的轨道杂交的变化有一个至关重要的作用,他们被证明是家庭依赖。我们的研究结果解释了最近的实验,没有调用外部场。

英文摘要:

We have theoretically explored the spin-orbit interaction in carbon nanotubes. We have found that, besides the dependence on chirality and diameter, the effects of spin-orbit coupling are anisotropic: spin splitting is larger for the higher valence or the lower electron band depending on the specific tube. Different tube behaviors can be grouped in three families, according to the so called chiral index. Curvature-induced changes in the orbital hybridization have a crucial role, and they are shown to be family-dependent. Our results explain recent experiments without invoking external fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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