【摘要】 从紧束缚模型出发 ,研究了链间相互作用对双激子态反向极化的影响 .结果发现 :加链间耦合后 ,双激子态仍主要局域在一条链中 .当简并破缺较小时 ,反向极化程度随耦合强度的增加大幅提高 ;当简并破缺较大时 ,反向极化程度随耦合强度的增加基本不变 .更多还原

【Abstract】 Effect of interchain coupling on the inversed polarization of a biexciton has be en studied in the framework of a tight-binding approximation. It was found that a biexciton state is mainly confined in one chain even the interchain coupling is included. The inversed polarization will be enhanced remarkably with the inte rchain coupling in the case of a weak non-degenerate confinement. However, the inversed polarization will keep nearly unchanged for a strong non-degenerate co nfinement.更多还原