自旋对三角势量子点中束缚磁极化子性质的影响

The Effect of Spin on the Property of Bound Magnetopolaron in Triangular Quantum Dot

本文采用Hubreches’修正的线性组合算符方法,研究了电子自旋-轨道相互作用对三角势量子点中束缚磁极化子基态性质的影响.考虑电子自旋效应时,得到了三角势量子点中束缚磁极化子的基态能量随量子点受限长度,电子场密度和磁场之间的变化关系.结果表明:当考虑自旋影响时,磁极化子的基态能量由三部分组成.并且束缚磁极化子的基态能量、自旋向上分裂能和向下分裂能都随电子场密度的增大而减小,随磁场强度的增大而增加;在相同的量子点受限长度下,束缚磁极化子基态能量、自旋向上(向下)分裂能都随库仑束缚势的增大而减少.

The effect of spin on the property of strong-coupled bound magnetopolaron in triangular quantum dot has been studied by employing a linear combination operator method. Considering the influence of spin, the ground-state energy of bound magnetopolaron as functions of the confinement length of triangular quantum dot and magnetic field and electron area density were discussed. Results illustrate when considering the effect of the spin, the ground-state energy is compose of three branches. And the ground-state energy, the spin-up and spin-down splitting energies of bound polaron decrease with the increasing of the electron area density and increase with enlarging the magnetic field; And the ground-state energy, the spin-up and spin-down splitting energies of magnetopolaron become small with en- hancing the Coulomb bound potential when the confinement length of QD is a constant.