自旋对非对称量子点中弱耦合束缚磁极化子基态能量的影响(英文)  

Effect of spin on ground-state energy of weak-coupled bound magnetopolaron in asymmetry quantum dot

作　　者：汪晓武[1] 肖娟[2] 李建红[2] 李志新[1] 

机构地区：[1]河北科技师范学院理化学院,河北秦皇岛066004 [2]河北科技师范学院数学与信息科技学院,河北秦皇岛066004

出　　处：《量子电子学报》2011年第4期483-489,共7页Chinese Journal of Quantum Electronics

基　　金：The Doctorial Foundation of Hebei Normal University of Science and Technology(2008YB001)

摘　　要：采用Tokuda修正的线性组合算符和幺正变换方法,研究了非对称量子点中弱耦合束缚磁极化子的性质。推导出了磁极化子基态能量随量子点横向、纵向受限长度和磁场的变化关系。进行了数值计算,计算结果表明:考虑自旋影响时,束缚磁极化子基态能量分裂成自旋向上(向下)两个分支。并且磁极化子基态能量、自旋向上(向下)分裂能随量子点横向、纵向受限长度的增加而减少,随磁场强度的增加而增大。The properties of bound magnetopolaron,which is weakly coupled to LO-phonon in an asymmetric quantum dot（QD） were studied by using Tokuda modified linear combination operator and unitary transformation methods.The expression of ground-state energy as functions of the transverse and longitudinal confinement lengths and magnetic field was derived.After a simple numerical calculation,it’s found that the ground-state energy of bound magnetopolaron splits into two branches after taking the spin influence into account.The ground-state energy and spin-up（down） splitting energy decrease with increasing the transverse and longitudinal confinement lengths,and they are increasing functions of magnetic field

关 键 词：光电子学 非对称量子点 自旋电子学 弱耦合 束缚磁极化子 

分 类 号：O469[理学—凝聚态物理] O472.3[理学—电子物理学]