Fine structure of the quantum-dot trion
Fine structure of the quantum-dot trion
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量子点三重体的精细结构
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
K. Kavokin
中科院分区：
文献类型：
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作者：
K. Kavokin
本文提出了一种量子点激子自旋-自旋相互作用激发态精细结构的理论。特别是，它示出的精细结构是普遍的正（两个空穴，一个电子）和负（两个电子，一个空穴）trions。它由四个双重态组成，其中三个形成一个紧凑的能级组，通过相同粒子之间（即两个电子或两个空穴之间）交换相互作用的能量与剩余的双重态分开。在六能级群中相邻的二重态之间的能量分离是属于不同能带的粒子之间的交换相互作用的小得多的能量的量级，即激子交换能量的量级。
A theory of the fine structure of the excited state of the quantum-dot trion, which is due to spin-spin interactions, is presented. In particular, it is shown that the fine structure is universal for both positive (two holes, one electron) and negative (two electrons, one hole) trions. It consists of four doublets, three of them forming a compact group of levels separated from the remaining doublet by the energy of the exchange interaction between identical particles (i.e. between two electrons or two holes). The energy separation between the adjacent doublets in the six-level group is of the order of the much smaller energy of the exchange interaction between particles belonging to different bands, i.e. of the exciton exchange energy.