Binding energy of an exciton bound to ionized acceptor in quantum dots

作者：Xie WF^*

来源：Communications in Theoretical Physics, 2001, 36(5): 631-634.

• quantum dot
• exciton complex
• few-body physics

Binding energies for an exciton (X) trapped in the two-dimensional quantum dot by a negative ion located on the z axis at a distance from the dot plane are calculated by using the method of few-body physics. This configuration is called a barrier (A(-), X) center. The dependence of the binding energy of the ground state of the barrier (A(-), X) center on the electron-to-hole mass ratio for a few values of the distance d between the fixed negative ion on the z axis and the dot plane is obtained. We find that when d --> 0, the barrier (A(-), X) center has not any bound state. We also studied the stability and binding energy of the ground state of the barrier (A(-), X) center in a parabolic quantum dot as a function of the distance d between the fixed negative ion on the z axis and the dot plane.

• 出版日期2001-11-15
• 单位广州大学