INFLUENCE OF BOTH ELECTRIC AND MAGNETIC FIELDS ON THE POLARON IN A CYLINDRICAL QUANTUM DOT
INFLUENCE OF BOTH ELECTRIC AND MAGNETIC FIELDS ON THE POLARON IN A CYLINDRICAL QUANTUM DOT
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DOI：
10.1142/s0217979204026238
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发表时间：
2004-08
影响因子：
1.7
通讯作者：
Rui-Qiang Wang;H. Xie;You-Bin Yu
中科院分区：
文献类型：
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作者：
Rui-Qiang Wang;H. Xie;You-Bin Yu
研究了在沿着生长轴方向的电场和磁场作用下，圆柱形量子点中电子基态能量的极化子修正。采用微扰理论和变分波函数相结合的方法，在有效质量和绝热近似下，计算了量子点外无限深的禁闭势.我们已经处理的系统，考虑到电子的相互作用与限制的纵向光学（LO）声子，以及侧表面（SSO）和顶面（TSO）光学声子。1，2基态能量位移作为一个函数的圆柱半径和电场和磁场的强度。结果表明，磁场显著增强了三种声子模式对电子基态能量修正的贡献，而电场只增强了表面声子（SSO和TSO）的贡献，而降低了LO声子的贡献.
The polaronic correction to the ground-state energy of the electron confined in a cylindrical quantum dot (QD) subject to electric and magnetic fields along the growth axis has been investigated. Using a combinative approach of perturbative theory and variational wavefunction, calculations are performed for an infinitely deep confinement potential outside the QD within the effective mass and adiabatic approximation. We have treated the system by taking into consideration the interaction of the electron with the confined longitudinal optical (LO) phonons as well as the side surface (SSO) and the top surface (TSO) optical phonons.1,2 The ground-state energy shift is obtained as a function of the cylindrical radius and the strength of electric and magnetic fields. The results show that the magnetic field heavily enhances the three types of phonon mode contribution to the correction of the electron ground-state energy while the electric field only improves the contribution of surface phonons (SSO and TSO) but decreases the contribution of LO phonons.