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arXiv 0802.3301cond-mat.mes-hall
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定域激子-极化激元凝聚中塞曼分裂和极化阶跃的抑制

Suppression of Zeeman splitting and polarization steps in localized exciton-polariton condensates

T. C. H. Liew, Yuri G. Rubo, I. A. Shelykh, A. V. Kavokin

摘要:

我们表明,在半导体微腔中的激子极化激元在外加磁场的凝聚体现在淬火的塞曼分裂的椭圆极化凝聚。有限粒子数局域凝聚体的圆偏振度随磁场的变化呈阶梯状增加。每个极化阶跃的宽度由极化激元-极化激元相互作用常数决定,阶跃的数目由凝聚体中极化激元的数目决定。凝聚体的磁化率定性地依赖于极化激元数的宇称。

英文摘要:

We show that the condensation of exciton-polaritons in semiconductor microcavities in an applied magnetic field manifests itself in the quenching of the Zeeman splitting of an elliptically polarized condensate. The circular polarization degree of a localized condensate with a finite number of particles increases as a function of the magnetic field with a step-like behavior. The width of each polarization step is fixed by the polariton-polariton interaction constants and the number of steps is fixed by the number of polaritons in the condensate. The magnetic susceptibility of the condensate depends qualitatively on the parity of the number of polaritons.

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