He Lixin, Bester Gabriel, Zunger Alex
National Renewable Energy Laboratory, Golden, Colorado 80401, USA.
Phys Rev Lett. 2005 Dec 9;95(24):246804. doi: 10.1103/PhysRevLett.95.246804.
We study the ground-state orbital and spin configurations of up to six electrons or holes loaded into self-assembled quantum dots. We use a general phase-diagram approach constructed from single-particle pseudopotential and many-particle configuration interaction methods. The predicted hole charging energies agree with recent charging experiments, but offer a different interpretation: we find that while the charging of electrons follows both Hund's rule and the Aufbau principle, the charging of holes follows a nontrivial charging pattern which violates both the Aufbau principle and Hund's rule.
我们研究了加载到自组装量子点中的多达六个电子或空穴的基态轨道和自旋构型。我们使用了一种由单粒子赝势和多粒子组态相互作用方法构建的通用相图方法。预测的空穴充电能量与最近的充电实验结果相符，但提供了不同的解释：我们发现，虽然电子的充电遵循洪德规则和构造原理，但空穴的充电遵循一种违反构造原理和洪德规则的非平凡充电模式。
