摘要
The ground state of a double quantum-dot structure is studied by a simplified Anderson-type model. Numerical calculations reveal that the ground-state 1evel of this artificial molecule increases with the increasing single particle level of the dot, and also increases with the decreasing transfer integrals. We show the staircase feature of the electron occupation and the properties of the ground-state eigenvector by varying the single particle level of the dot.
作者
YOU Jian-qiang
ZHENG Hou-zhi
游建强;郑厚植(National Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083)
基金
the National Natural Science Foundation of China under Grant No.19734020
the National Climbing Program of China,and K.C.Wong Education Foundation,Hong Kong.
