Energy renormalization of exciton complexes in GaAs quantum dots
Energy renormalization of exciton complexes in GaAs quantum dots
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DOI：
10.1103/physrevb.82.201301
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发表时间：
2010-11-04
影响因子：
3.7
通讯作者：
Tsuchiya, Takuma
中科院分区：
文献类型：
--
作者：
Abbarchi, Marco;Kuroda, Takashi;Tsuchiya, Takuma
利用GaAs/AlGaAs自组装量子点研究了完全受限系统的少粒子动力学，该系统与纯库仑相互作用有关，不受内部应变场的影响.系统演化的结合能的正，负trions，以及双激子，与点的大小被解释在Hartree平均场校正单粒子状态和粒子间的相关性，导致一个不可分离的动力学之间的平衡。在量子蒙特卡罗方法的框架内，通过精确的多体计算很好地再现了实验行为。
Using GaAs/AlGaAs self-assembled quantum dots we study the few-particle dynamics of fully confined systems, which is associated with purely Coulomb interaction and is not affected by the internal strain field. Systematic evolution in the binding energies of positive and negative trions, as well as biexcitons, with dot size is interpreted in terms of a balance between the Hartree mean-field corrections on single-particle states and the interparticle correlations which lead to a nonseparable dynamics. The experimental behaviors are well reproduced by exact many-body calculations within the framework of the quantum Monte Carlo approach.