Temperature dependence of the properties of strong-coupling bipolaron in a quantum dot

被引：10
作者：
Eerdunchaolu [1 ]
Xin, Wei [1 ]
机构：
[1] Hebei Normal Univ Sci & Technol, Inst Condensed Matter Phys, Qinhuangdao 066004, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 03期
关键词：
Quantum dot; Bipolaron; Vibration frequency; Induced potential; Effective potential; Temperature dependence; STABILITY; ELECTRON;
D O I：
10.1016/j.physb.2010.10.063
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Temperature dependence of the properties of strong-coupling bipolaron in a quantum dot (QD) is studied based on the Lee-Low-Pines-Huybrechts variational method and quantum statistical theory. Results of the numerical calculation show that the vibration frequency as well as the absolute value of the induced potential and the effective potential all increase with increasing coupling strength and temperature, respectively, and they also increase with decreasing relative distance of electrons. The bipolarons are closer and more stable when the temperature is higher and coupling strength is larger. The influence of radius of QD and dielectric constant ratio on the effective potential is little. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：358 / 362
页数：5
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