Influence of dielectric environment on exciton and bi-exciton properties in colloidal, type II quantum dots

Influence of dielectric environment on exciton and bi-exciton properties in colloidal, type II quantum dots
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介电环境对胶体 II 型量子点中激子和双激子性质的影响

DOI:
10.1088/1742-6596/609/1/012003
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发表时间:
2015
期刊:
Conference Series
影响因子:
--
通讯作者:
Miloszewski J
Miloszewski J
中科院分区:
--
文献类型:
--
作者:
Miloszewski J

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我们目前的理论计算的II型CdSe/CdTe量子点系统。我们使用一个8带kp哈密顿量,包括自旋轨道相互作用,应变,和一阶压电效应。激子和双激子状态被发现使用配置相互作用(CI)的方法,明确包括库仑相互作用的影响,以及交换和多电子配置之间的相关效应。我们研究了CI哈密顿量的收敛性与创建哈密顿量所用的单粒子态的数目的关系。我们发现,有一个很强的相关性之间的介电常数的环境和激子和双激子的能量。
We present theoretical calculations of type II CdSe/CdTe quantum dots systems. We use an 8-band kp Hamiltonian that includes spin-orbit interaction, strain, and first order piezoelectric effects. Exciton and bi-exciton states are found using the configuration interaction (CI) method that explicitly includes the effects of the Coulomb interaction, as well as exchange and correlation effects between many-electron configurations. We study convergence of the CI Hamiltonian with respect to the number of single particle states used in creation of the Hamiltonian. We show that there is a very strong correlation between the dielectric constant of the environment and exciton and bi-exciton energies.
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