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首页> 外文期刊>Physical review >High-field Magnetooptical Behavior Of Polymer-embedded Single-walled Carbon Nanotubes
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High-field Magnetooptical Behavior Of Polymer-embedded Single-walled Carbon Nanotubes

机译：聚合物嵌入单壁碳纳米管的高场磁光行为

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摘要

We report a study of the magnetophotoluminescence (PL) of single-walled carbon nanotubes embedded in polymer films. The magnetic-field dependence of the intensity and emission energy is used to deduce the splitting and mixing of the bright and dark exciton states. It is shown that the presence of strain in the films causes a considerable increase in the bright-dark exciton splitting. The unstrained nanotubes show considerably smaller exciton splittings than reported previously and demonstrate an unexpected magnetic suppression of the PL intensity which can only be observed once the Aharanov-Bohm phase splitting is significantly larger than the bright-dark exciton splitting. Functional fitting of the data also allows the diameter dependence of the Aharanov-Bohm (AB) phase-induced energy shifts to be accurately measured. Evidence is also presented for the existence of a zero-field AB splitting due possibly to spin-orbit interaction effects.
机译：我们报告了嵌入聚合物薄膜中的单壁碳纳米管的磁光致发光（PL）研究。磁场对强度和发射能量的依赖性被用来推断明和暗激子态的分裂和混合。结果表明，薄膜中应变的存在会导致明暗激子分裂明显增加。未应变的纳米管显示出比以前报告的要小得多的激子分裂，并显示出对PL强度的意外磁抑制，只有当Aharanov-Bohm相分裂明显大于明暗激子分裂时，才能观察到这种现象。数据的功能拟合还允许精确测量Aharanov-Bohm（AB）相诱导的能量位移的直径依赖性。还提供了可能由于自旋轨道相互作用效应而存在零场AB分裂的证据。

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