论文标题
电子孔Quadrilayers中耦合激子液体的地面和激发态
Ground and excited states of coupled exciton liquids in electron-hole quadrilayers
论文作者
论文摘要
层间激子是限制在单独的二维层中的电子和孔的结合状态。由于其排斥性偶极相互作用，层间激子可以形成相关的液体。如果存在另一个电子孔双层，则来自不同双层的激子可以表现出相互吸引力。我们通过超注的链形式主义研究了这种四边形系统。我们计算基态能量，配对相关函数和集体模式速度作为激子密度的功能。我们估计过渡到配对的Biexciton相的临界密度。对于强烈不平衡（不等密度）系统，更稀释的双层中的激子作为极性表现为极性。我们计算这种激子 - 棕榈的能量和有效质量。
Interlayer excitons are bound states of electrons and holes confined in separate two-dimensional layers. Due to their repulsive dipolar interaction, interlayer excitons can form a correlated liquid. If another electron-hole bilayer is present, excitons from different bilayers can exhibit mutual attraction. We study such a quadrilayer system by a hypernetted chain formalism. We compute ground state energies, pair correlation functions, and collective mode velocities as functions of the exciton densities. We estimate the critical density for the transition to a paired biexciton phase. For a strongly unbalanced (unequal density) system, the excitons in the more dilute bilayer behave as polarons. We compute energies and effective masses of such exciton-polarons.
