D- centers in spherical quantum dots

• 摘要：

  A negatively charged donor center D- (i.e., a neutral shallow donor D0 that binds a second electron) in a spherical quantum dot is studied by use of a variational approach. A trial function which includes electron-correlation effects and approaches the Chandrasekhar-type function in the limit of zero barrier height is used. The well-radius and barrier-height dependence of the binding energy of the D- center is obtained. The dimensional characteristics are clearly demonstrated not only for the binding energy and its maximum of the D- center but also for the ratio of D- to D0 binding energy and the electron-correlation effect. © 1992 The American Physical Society.

• 作者：

  Zhu Jia-Lin;Zhao Jie-Hua;Duan Wen-Hui;Gu Bing-Lin

• 刊名：

  Physical Review B

• 在线出版时间：

  1992