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arXiv 0907.4934cond-mat.mes-hallcond-mat.str-el
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强磁场下石墨烯中极化激元的玻色-爱因斯坦凝聚

Bose-Einstein condensation of polaritons in graphene in a high magnetic field

Oleg L. Berman, Roman Ya. Kezerashvili, Yurii E. Lozovik

摘要:

预测了在强磁场$B$中,嵌入光学微腔的石墨烯层中磁激子极化激元的玻色-爱因斯坦凝聚(BEC)。该系统的基本属性(相比之下,例如,对于嵌入腔中的量子阱),磁场的影响较强,而无序的影响较弱。二维磁激子极化激元气体被认为是在一个平面谐波电场的潜力施加到激子或抛物线形状的光学腔,导致捕获的微腔光子。结果表明,有效极化激元质量$M_{\rm eff}$随磁场的增大而增大,其规律为:$B^{1/2}$ . BEC临界温度$T_{c}^{(0)}$随$B^{-1/4}$减小,随抛物阱的弹性常数增大而增大。得到了石墨烯在强磁场中产生磁激子的拉比分裂。

英文摘要:

The Bose-Einstein condensation (BEC) of magnetoexcitonic polaritons in a graphene layer embedded in a optical microcavity in a high magnetic field $B$ is predicted. The essential property of this system (in contrast, e.g., to a quantum well embedded in a cavity) is stronger influence of magnetic field and weaker influence of disorder. A two-dimensional (2D) magnetoexcitonic polaritons gas is considered in a planar harmonic electric field potential applied to excitons or a parabolic shape of the optical cavity causing the trapping of microcavity photons. It is shown that the effective polariton mass $M_{\rm eff}$ increases with magnetic field as $B^{1/2}$. The BEC critical temperature $T_{c}^{(0)}$ decreases as $B^{-1/4}$ and increases with the spring constant of the parabolic trap. The Rabi splitting related to the creation of a magnetoexciton in a high magnetic field in graphene is obtained.

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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