论文标题
带电荷层状偏心的新月形状态
Crescent states in charge-imbalanced polariton condensates
论文作者
论文摘要
我们研究嵌入光学微腔内的二维电荷型电子孔系统。我们发现，与光子的强耦合偏向于质量动量的零或小中心配对的状态，导致凝结状态具有自发折叠的时间反转和旋转对称性，而未配对的载体则占据了各向异性新月形的动量空间。新月形受到中等电荷不平衡的青睐，而富德（Ferrel-larkin-ovchinnikov）状状态 - 较大的质量动量中心配对，而不是出现在强大的失衡中。新月形稳定性是由远程库仑相互作用与极端长期光子介导的相互作用结合起来的。
We study two-dimensional charge-imbalanced electron-hole systems embedded in an optical microcavity. We find that strong coupling to photons favors states with pairing at zero or small center of mass momentum, leading to a condensed state with spontaneously broken time-reversal and rotational symmetry, and unpaired carriers that occupy an anisotropic crescent-shaped sliver of momentum space. The crescent state is favoured at moderate charge imbalance, while a Fulde--Ferrel--Larkin--Ovchinnikov-like state --- with pairing at large center of mass momentum --- occurs instead at strong imbalance. The crescent state stability results from long-range Coulomb interactions in combination with extremely long-range photon-mediated interactions.
