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Gate-voltage induced trions in suspended carbon nanotubes

机译:悬浮碳纳米管中栅极电压诱导的三子

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摘要

We observe trion emission from suspended carbon nanotubes where carriers are introduced electrostatically using field-effect transistor structures. The trion peak emerges below the E_(11) emission energy at gate voltages that coincide with the onset of bright exciton quenching. By investigating nanotubes with various chiralities, we verify that the energy separation between the bright exciton peak and the trion peak becomes smaller for larger diameter tubes. Trion binding energies that are significantly larger compared to surfactant-wrapped carbon nanotubes are obtained, and the difference is attributed to the reduced dielectric screening in suspended tubes.
机译:我们观察到悬浮碳纳米管发出的三极子发射,其中使用场效应晶体管结构以静电方式引入了载流子。三极峰出现在栅极电压下E_(11)发射能量以下,这与明亮激子猝灭的发生相吻合。通过研究具有各种手性的纳米管,我们验证了对于较大直径的管子,明亮激子峰和三重子峰之间的能量分离变小了。与表面活性剂包裹的碳纳米管相比,可以获得显着更大的Trion结合能,其差异归因于悬浮管中介电屏蔽的减少。

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  • 来源
    《Physical review》 |2016年第4期|041402.1-041402.5|共5页
  • 作者单位

    Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan;

    Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan;

    Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan;

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