应用电场中反向激子和三重子的运动
Counterdirectional Exciton and Trion Motion in Applied Electric Field
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中文总结 AI 辅助
研究带电激子复合体实空间输运动力学，通过光学观测发现电场下三重子运动及对中性激子的反作用，揭示混合激子流体非平衡输运机制，为成像复杂带电准粒子动力学建立途径。
中文摘要 AI 辅助
带电激子复合体是半导体光电和多体性质的核心，但其实空间输运动力学很大程度上仍未被探索。本文报道了在施加电场下对三重子运动的直接光学观测。三重子表现出电驱动漂移，速度接近\(10^5 m/s\)。意外的是，三重子流对共存的中性激子产生显著反作用，使其反向运动，产生反向传播的激子 - 三重子输运。结果揭示了混合激子流体相互作用驱动的非平衡输运机制，并为成像更复杂带电准粒子动力学建立了直接途径。
英文摘要
Charged excitonic complexes are central to the optoelectronic and many-body properties of semiconductors, yet their real-space transport dynamics remain largely unexplored. Here, we report the direct optical observation of trion motion under an applied electric field. The trions exhibit electrically driven drift with velocities approaching {$10^5~\mathrm{m/s}$}. Unexpectedly, the trion flow induces a pronounced back-action on coexisting neutral excitons, driving them in the opposite direction and giving rise to counterpropagating exciton-trion transport. Our results reveal an interaction-driven nonequilibrium transport regime of mixed excitonic fluids and establish a direct route for imaging the dynamics of more complex charged quasiparticles, including doubly charged excitons.
