论文标题
间接激子双层中有吸引力和排斥的偶极相互作用
Attractive and repulsive dipolar interaction in bilayers of indirect excitons
论文作者
论文摘要
我们探索间接激子（IX）中有吸引力的偶极相互作用。对于一对耦合量子井（CQW）中的IX层，平面外IX电偶极子导致IX之间的排斥双极相互作用。 IX之间的有吸引力的偶极相互作用在2-CQW异质结构中实现，在两个分离的CQW对中，两个IX层。我们在实验测量和理论模拟中都发现，一层IX的密度增加会导致另一层IX的单调能量减少。我们还发现，一层Ixs云的平面偏移向另一层的IX云。这种行为在质上与有吸引力的偶极相互作用一致。测得的IX能量还原和IX云移动高于相关液体理论给出的值。
We explore attractive dipolar interaction in indirect excitons (IXs). For one layer of IXs in a single pair of coupled quantum wells (CQW), the out-of-plane IX electric dipoles lead to repulsive dipolar interaction between IXs. The attractive dipolar interaction between IXs is realized in a 2-CQW heterostructure with two IX layers in two separated CQW pairs. We found both in experimental measurements and theoretical simulations that increasing density of IXs in one layer causes a monotonic energy reduction for IXs in the other layer. We also found an in-plane shift of a cloud of IXs in one layer towards a cloud of IXs in the other layer. This behaviour is qualitatively consistent with attractive dipolar interaction. The measured IX energy reduction and IX cloud shift are higher than the values given by the correlated liquid theory.
