Bound electron pairs (BEPs) arising due to peculiarities of the band structure of topologically non‐trivial materials are of interest as charge and spin carriers with energies in the bandgap. Moreover, being composite bosons, they can also possess completely unusual collective properties. In this regard, highest importance is the problem of their decay time. The processes of radiative decay of BEPs are studied, considering the electron–electron interaction in the final state, into which the BEPs decay. It is found that the decay time of singlet BEPs lies in the nanosecond range and significantly exceeds other characteristic electron relaxation times. The radiative decay of triplet BEPs is impossible.

中文翻译：

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具有双频谱的二维材料中束缚电子对向未结合相互作用电子的辐射衰减

由于拓扑学上不重要的材料的能带结构的特殊性而产生的束缚电子对（BEP）作为带隙中具有能量的电荷和自旋载流子引起了人们的关注。而且，作为复合玻色子，它们还可以拥有完全不同寻常的集体特性。在这方面，最重要的是其衰减时间的问题。研究了BEP的辐射衰减过程，考虑了BEP衰减到的最终状态下的电子-电子相互作用。发现单线态BEP的衰减时间在纳秒范围内，并且大大超过其他特征电子弛豫时间。三重态BEP的辐射衰减是不可能的。