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arXiv 1701.01029cond-mat.mes-hall
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量子霍尔和分数量子霍尔中的极化子-极化激元

Polaron-Polaritons in the Integer and Fractional Quantum Hall Regimes

Sylvain Ravets, Patrick Knüppel, Stefan Faelt, Martin Kroner, Werner Wegscheider, Atac Imamoglu

摘要:

二维电子系统中的基本准粒子可以被描述为激子-极化子,因为电子-激子相互作用确保了通过费米电子-空穴对激发来修整激子。一个相关的未决问题是当电子占据平带和电子-电子相互作用变得突出时,对这种描述的修改。在这里,我们执行腔光谱的二维电子系统中的强耦合制度,极化激元共振进行签名的强相关的量子霍尔相位。通过测量极化激元分裂的演化下的外部磁场,我们证明了修改的电子-激子相互作用,我们与相空间填充在整数填充因子和极化子敷料分数填充因子。观察到的非线性行为显示出极大的希望,增强极化激元-极化激元相互作用。

英文摘要:

Elementary quasi-particles in a two dimensional electron system can be described as exciton-polarons since electron-exciton interactions ensures dressing of excitons by Fermi-sea electron-hole pair excitations. A relevant open question is the modification of this description when the electrons occupy flat-bands and electron-electron interactions become prominent. Here, we perform cavity spectroscopy of a two dimensional electron system in the strong-coupling regime where polariton resonances carry signatures of strongly correlated quantum Hall phases. By measuring the evolution of the polariton splitting under an external magnetic field, we demonstrate the modification of electron-exciton interactions that we associate with phase space filling at integer filling factors and polaron dressing at fractional filling factors. The observed non-linear behavior shows great promise for enhancing polariton-polariton interactions.

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