电场对非对称量子点中强耦合极化子基态和第一激发态的影响(英文)  

ELECTRIC FIELD EFFECT ONTHE GROUND AND THE FIRST EXCITED STATES OF STRONG-COUPLING POLARON IN AN ASYMMETRIC QUANTUM DOT

作　　者：梁志辉[1] 

机构地区：[1]内蒙古民族大学物理与电子信息学院,内蒙古通辽028043

出　　处：《低温物理学报》2014年第1期50-54,共5页Low Temperature Physical Letters

基　　金：supported by the National Science Foundation of China(Grant No.10964005.);the innovation team of Inner Mongolia University for the Nationalities~~

摘　　要：采用Pekar类型变分方法研究非对称量子点中强耦合极化子基态和激发态,得出极化子的基态和激发态能量随电场和横向和纵向有效受限长度的变化关系.结果发现基态和激发态能量是电场的减函数。We study the ground and the first excited state energies of a strong-coupling polaron in an asymmetric quantum dot （QD）. The effects of the electric field and the transverse and the longitudinal effective confinement lengths on the ground and the first excited state energies are taken into account by using a variational method of the Pekar type. It is found that the ground and the first excited state energies are decreasing functions of the electric field. They will increase rapidly with decreasingtransverse and longitudinal effective confinement lengths.

关 键 词：非对称量子点 极化子 Pekar类型变分方法 电场 

分 类 号：O471.1[理学—半导体物理]