arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2207.07342cond-mat.mes-hall
收藏

碳纳米管局域门控对单层MoSe2中Trion的限制

Trion confinement in monolayer MoSe2 by carbon nanotube local gating

Takato Hotta, Haruna Nakajima, Shohei Chiashi, Taiki Inoue, Shigeo Maruyama, Kenji Watanabe, Takashi Taniguchi, Ryo Kitaura

摘要:

我们已经成功地限制trions到一个一维的限制空间的MoSe 2器件与CNT栅电极。干转移过程,包括确定性的干转移对齐的CNT,导致hBN封装的MoSe 2器件与CNT背栅电极。与没有CNT栅电极的位置相比,经由CNT栅电极施加电压显著改变了具有CNT栅电极的位置处的PL光谱。PL成像已经揭示,来自trions的图像对比度沿着下方的CNT电极是线性的,与trions响应于CNT局部门控的1D限制一致。从PL图像中获得的限制宽度为5.5 × 10^2 nm,与具有衍射极限加宽的纳米级1D限制trions一致。这项工作已经证明了电控制的激子状态在纳米尺度上,导致新的光电性能和激子器件的未来。

英文摘要:

We have successfully confined trions into a one-dimensional restricted space of a MoSe2 device with CNT gate electrodes. The dry transfer process, including deterministic dry transfer of aligned CNTs, has led to an hBN-encapsulated MoSe2 device with CNT back gate electrodes. In contrast to a location without CNT gate electrodes, applying voltage via CNT gate electrodes significantly alters PL spectra at a location with CNT gate electrodes. PL imaging has revealed that image contrast from trions is linear along the CNT electrode underneath, consistent with 1D confinement of trions in response to the CNT local gating. The confinement width obtained from the PL image is 5.5 x 10^2 nm, consistent with nanoscale 1D confined trions with the diffraction limit broadening. This work has demonstrated electrical control of excitonic states at the nanoscale, leading to novel optoelectronic properties and exciton devices in the future.

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。

↑