Abstract

The possibility of formation of a Bose–Einstein condensate (BEC) of excitons in a model nonideal lattice of a molecular crystal is considered. The spectrum of corresponding exciton excitations is analyzed. The dependence of the chemical potential on the concentration of structural defects is numerically simulated within the virtual crystal approximation, and particular features of the appearance of an exciton condensate in a nonideal system are studied based on this simulation. Conditions under which an BEC of light and dark excitons can appear are revealed.

中文翻译：

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缺陷晶体中激子的玻色-爱因斯坦凝聚态

摘要

考虑在分子晶体的模型非理想晶格中形成激子的玻色-爱因斯坦凝聚物（BEC）的可能性。分析了相应激子激发的光谱。在虚拟晶体近似中，对化学势对结构缺陷浓度的依赖性进行了数值模拟，并基于此模拟研究了非理想系统中激子冷凝物的外观的特定特征。揭示了可以出现亮和暗激子的BEC的条件。