论文标题
在电子孔对的二维稀释气中过渡到超old阶段
Transition to a supersolid phase in a two-dimensional dilute gas of electron-hole pairs
论文作者
论文摘要
该文章使用相干状态形式主义（Keldysh形式主义），描述了从均匀的超氟化状态到超固体状态的过渡，其具有空间分离的电子孔对的二维稀释气体。通过在集体激发光谱中的最小旋转型的出现，预示着这种过渡，该光谱型在层或对密度之间的距离增加。这标志着系统对配对密度的空间调制的出现的不稳定。已经发现，向六角形超固体阶段的一阶过渡发生了早些时候。没有现象学常数的理论是为了在电子和孔的有效质量之间建立任意关系的理论。该系统的相图已绘制在变量“对的化学电位 - 层之间的距离”中。已经表明，在相变期间，冷凝物的平均密度有所增加。已经确定，随着化学电位的增加，不均匀相位分解为高密度区域，这些区域被密度变为零的线所包围，这些线形成连续的网络。
Using coherent-state formalism (the Keldysh formalism), the article describes a transition from a homogeneous superfluid state to a supersolid state in a two-dimensional dilute gas of electron-hole pairs with spatially separated components. Such a transition is heralded by the appearance of a roton-type minimum in the collective excitation spectrum, which touches the abscissa axis as the distance between the layers or the pair density increases. This signals the instability of the system with respect to the appearance of a spatial modulation of the pair density. It has been found that a first-order transition to a hexagonal supersolid phase takes place a little earlier. A theory without phenomenological constants has been developed for an arbitrary relation between the effective masses of an electron and a hole. A phase diagram for the system has been plotted in the variables "the chemical potential of pairs - the distance between the layers". It has been shown that there is a jump in the average density of the condensate during the phase transition. It has been established that with an increase in the chemical potential, the inhomogeneous phase breaks up into high-density regions surrounded by lines at which the density becomes zero, with these lines forming a continuous network.
