Effective potential of strong-coupling bipolaron in a parabolic quantum dot

被引：0

作者：

Eerdunchaolu ^{[1
]}

Wuyunqimuge ^{[2
]}

Wang H. ^{[1
]}

机构：

[1] Institute of Condensed Matter Physics, Hebei Normal University of Science and Technology, Qinhuangdao

[2] College of Physics and Electronic Information, Inner Mongolia University for Nationalities, Tongliao

来源：

Guangxue Xuebao/Acta Optica Sinica | 2010年 / 30卷 / 09期

关键词：

Bipolaron; Effective potential; Induced potential; Lee-Low-Pines-Huybrechts variational method; Quantum dot; Quantum optics;

D O I：

10.3788/AOS20103009.2737

中图分类号：

学科分类号：

摘要：

The ground state properties of the strong coupling bipolarons in a parabolic quantum dot are studied based on the Lee-Low-Pines-Huybrechts variational method. The law of the effective potential Veff of the strong coupling bipolarons changing with the strength of the electron-phonon coupling α, the relative distance between two electrons r, and the radiu of quantum dot R0 are derived. The results show that Veff consists of three parts: Coulomb potential Vcoul, confining potential Vconf and induced potential Ve-LO. Ve-LO is always less than zero, and the absolute value |Ve-LO| increases when the strength α, and increases when the relative distance r between the electrons and guantum dot's radius R0 decreace. The absolute value |Veff| increases with the strength α increasing and increases with the relative distance r decreasing. α and r are the main factors to influence the effective value. However, the quantum dot's radius R0 and the dielectric constant ratio η have little influence on the effective potential Veff.

引用

页码：2737 / 2741

页数：4

共 13 条

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