Role of the exchange of carriers in elastic exciton-exciton scattering in quantum wells
Role of the exchange of carriers in elastic exciton-exciton scattering in quantum wells
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DOI：
10.1103/physrevb.58.7926
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发表时间：
1998-09-15
影响因子：
3.7
通讯作者：
Schwendimann, P
中科院分区：
文献类型：
--
作者：
Ciuti, C;Savona, V;Schwendimann, P
本文研究了半导体量子阱中激子-激子的弹性库仑散射，包括激子间的交换和自旋自由度。理论结果表明，电子-电子和空穴-空穴交换是主要的相互作用机制，而经典直接项可以忽略。在玻恩近似下计算了密度相关的均匀线宽，与现有的实验数据吻合得很好。由于载流子的激子间交换，碰撞导致自旋弛豫，正如在最近的时间分辨光致发光实验中实际观察到的那样。[S0163-1829（98）06736-8]。
A study of the elastic exciton-exciton Coulomb scattering in a semiconductor quantum well is presented, including the interexciton exchange of carriers and the spin degrees of freedom. The theoretical results show that electron-electron and hole-hole exchanges are the dominant mechanisms of interaction, while the classical direct term is negligible. The density-dependent homogeneous linewidth is calculated within the Born approximation and good agreement with the existing experimental data is obtained. Owing to the interexciton exchange of carriers, collisions lead to spin relaxation as actually observed in recent time-resolved photoluminescence experiments. [S0163-1829(98)06736-8].