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首页> 外文期刊>Solid State Communications >Coexistence of two Bose-Einstein condensates of two-dimensional magnetoexcitons. Exciton-plasmon collective elementary excitations
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Coexistence of two Bose-Einstein condensates of two-dimensional magnetoexcitons. Exciton-plasmon collective elementary excitations

机译：二维磁激子的两个玻色-爱因斯坦凝聚物共存。激子-等离子体激元集体基本激发

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Possibility of the Bose-Einstein condensation of magnetic excitons in an ideal two-dimensional system in a strong perpendicular magnetic field is investigated theoretically taking into account the influence of virtual transitions to the excited Landau levels and Anderson-type coherent excited states. It was understood, that the Bose-Einstein condensed (BEC-ed) magnetoexcitons with considerable wave vector K and motional dipole moment Kl(2), where l is the magnetic length, can form the droplets of the metastable dielectric liquid phase, whereas the BEC-ed magnetoexcitons with K = 0 can form a stable degenerate Bose-gas surrounding the droplet. We have shown that collective elementary excitations of the BEC of excitons are mixed with plasma oscillations of the electron-hole system in the presence of strong perpendicular magnetic field. Their mutual influence is determined by the coherence factor and essentially depends on the condensate wave vector K. (c) 2004 Elsevier Ltd. All rights reserved.
机译：理论上考虑了虚拟跃迁对激发的朗道能级和安德森型相干激发态的影响，从理论上研究了理想二维系统中强激子中磁激子的玻色-爱因斯坦凝聚的可能性。可以理解，具有相当大的波矢K和运动偶极矩K1（2）的Bose-Einstein凝聚（BEC-ed）磁激子可以形成亚稳介电液相的液滴，而B = 0的BEC励磁激子可以在液滴周围形成稳定的简并玻色气体。我们已经表明，在强垂直磁场的作用下，激子的BEC的集体基本激发与电子-空穴系统的等离子体振荡混合在一起。它们的相互影响由相干因子决定，并且基本上取决于凝结水矢量K。（c）2004 Elsevier Ltd.保留所有权利。

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