Condensation of indirect excitons
Condensation of indirect excitons
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DOI：
10.1557/mrs.2020.123
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发表时间：
2020-05
期刊：
影响因子：
5
通讯作者：
L. Butov
中科院分区：
文献类型：
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作者：
L. Butov
间接激子(IX)，也称为层间激子，是电子和空穴的束缚对，限制在空间上分开的层中。由于IXs的寿命很长，它们可以冷却到量子简并温度以下。这为实验研究冷复合玻色子提供了机会。本文综述了我们对冷IXs的研究，介绍了IXs的自发相干和玻色-爱因斯坦凝聚，以及在IXs凝聚体中观察到的现象，包括空间有序激子态、激子密度波的公度效应、自旋织构、Pancharatnam-Berry相、长程相干自旋输运和干涉位错。
An indirect exciton (IX), also known as an interlayer exciton, is a bound pair of an electron and a hole confined in spatially separated layers. Due to their long lifetimes, IXs can cool below the temperature of quantum degeneracy. This provides an opportunity to experimentally study cold composite bosons. This article overviews our studies of cold IXs, presenting spontaneous coherence and Bose–Einstein condensation of IXs and phenomena observed in the IX condensate, including the spatially ordered exciton state, commensurability effect of exciton density wave, spin textures, Pancharatnam–Berry phase, long-range coherent spin transport, and interference dislocations.