Singlet-Triplet Transitions of a Poeschl-Teller Quantum Dot  

作　　者：XIE Wen-Fang 

机构地区：Department of Physics, Guangzhou University, Guangzhou 510006, China

出　　处：《Communications in Theoretical Physics》2006年第6X期1101-1104,共4页理论物理通讯（英文版）

基　　金：The project supported by National Natural Science Foundation of China under Grant No. 10475021

摘　　要：We study the energy spectra of a two-dimensional two-electron quantum dot （QD） with P6schl-Tefler confining potential under the influence of perpendicular homogeneous magnetic field. Calculations are made by using the method of numerical diagonalization of Hamiltonian matrix within the effectlve-mass approximation. A ground-state behavior （spin singlet-triplet transitions） as a function of the strength of a magnetic field is found. We find that the dot radius R of a Poeschl-Teller potential is important for the ground-state transition and the feature of ground-state for a Poeschl Teller QD and a parabolic QD is similar when R is larger. The larger the well depth, the higher the magnetic field for the singlet-triplet transition of the ground-state of two interacting electrons in a Poesehl-Teller QD.

关 键 词：electron-electron interaction quantum dot SEMICONDUCTOR 

分 类 号：O471.1[理学—半导体物理]