二维电子系统中的三粒子电子空穴复合体
Three-particle electron-hole complexes in two-dimensional electron systems
摘要：
研究了量子霍尔绝缘体中由两个处于完全填充零电子朗道能级的空穴和一个处于未占据第一朗道能级的激发电子组成的三粒子复合体。这些三粒子复合物的显著特征是电子-空穴质量对称性和量子霍尔绝缘体本身的小能隙。在量子化磁场中的三振子能谱的理论计算预测，除了基态，三振子具有激发束缚态的层次结构。与理论模拟一致，我们观察到新的光致发光线相关的激发态的trion。相对小的能隙允许三粒子复合物与磁等离子体振荡和等离子体子的形成结合。实验研究了等离子体激子的性质。
英文摘要：
Three-particle complexes consisting of two holes in the completely filled zero electron Landau level and an excited electron in the unoccupied first Landau level are investigated in a quantum Hall insulator. The distinctive features of these three-particle complexes are an electron-hole mass symmetry and the small energy gap of the quantum Hall insulator itself. Theoretical calculations of the trion energy spectrum in a quantizing magnetic field predict that, besides the ground state, trions feature a hierarchy of excited bound states. In agreement with the theoretical simulations, we observe new photoluminescence lines related to the excited trion states. A relatively small energy gap allows the binding of three-particle complexes with magnetoplasma oscillations and formation of plasmarons. The plasmaron properties are investigated experimentally.
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