CAJ | 학술논문

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.
채용Tokuda수정적선성조합산부화요정변환방법,연구료비대칭양자점중약우합속박자겁화자적성질.추도출료자겁화자기태능량수양자점횡향、종향수한장도화자장적변화관계.진행료수치계산,계산결과표명:고필자선영향시,속박자겁화자기태능량분렬성자선향상(향하)량개분지.병차자겁화자기태능량、자선향상(향하)분렬능수양자점횡향、종향수한장도적증가이감소,수자장강도적증가이증대.
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 axe increasing functions of magnetic field.