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arXiv 2602.13490cond-mat.mes-hall
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混合维度异质结构中的三子转移

Trion transfer in mixed-dimensional heterostructures

RIKEN Pioneering Research Institute(RIKEN先锋研究所);RIKEN Center for Advanced Photonics(RIKEN先进光子学中心);Keio University(庆应义塾大学);National Institute of Advanced Industrial Science and Technology (AIST)(国立产业技术综合研究院);Saitama University(埼玉大学);The University of Tokyo(东京大学)

N. Fang, U. Erkilic, Y. R. Chang, S. Fujii, D. Yamashita, C. F. Fong, S. Morito, K. Kanahashi, T. Taniguchi, K. Watanabe, K. Ueno, K. Nagashio, Y. K. Kato

AI总结:

提出通过混合维度异质结构中的三子转移机制,实现无掺杂本征半导体中高效三子发射,效率提升超百倍。

摘要:

带电激子,或称三子,具有独特的自旋和电荷自由度,长期以来主要在有掺杂的系统中进行研究,其中电荷被认为是不可或缺的。在这里,我们提出了一种替代途径,通过转移机制从本征、无缺陷的半导体中实现超高效的三子发射。通过在混合维度异质结构中激发二维二硒化钨施主中的三子,并将其转移至一维碳纳米管受主,我们规避了通常的载流子需求,克服了固有的俄歇淬灭限制。得益于维度异质性引起的储层效应,该过程实现的三子发射效率比传统掺杂方法提高了超过100倍,并且在各种掺杂条件下保持稳健。我们的发现将激子转移范式扩展到三体准粒子,为推进激子物理和基于三子的光电子/自旋电子学应用提供了新平台。

英文摘要:

Charged excitons, or trions, offering unique spin and charge degrees of freedom, have primarily been investigated in doped systems where charges are long considered indispensable. Here, we present an alternative route to ultra-efficient trion emission from an intrinsic, defect-free semiconductor via a transfer mechanism. By exciting trions in two-dimensional tungsten-diselenide donors and transferring them into one-dimensional carbon-nanotube acceptors in mixed-dimensional heterostructures, we circumvent the usual carrier requirement, overcoming intrinsic Auger-quenching limitations. Benefitting from a reservoir effect induced by dimensional heterogeneity, this process achieves trion emission efficiencies increased by over 100-fold compared to conventional doping-based approaches, and remains robust across diverse doping conditions. Our findings extend the exciton transfer paradigm to the three-body quasiparticles, offering a new platform for advancing excitonic physics and trion-based optoelectronic/spintronic applications.

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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