三角量子阱中磁极化子的Zeeman效应和Rashba效应  

Zeeman Effect and Rashba Effect of Magnetopolaron in a Triangular Quantum Well

作　　者：梁雄[1] 单淑萍[1] LIANG Xiong;SHAN Shuping(School of Physics and Electromechanical Engineering,Longyan University,Longyan,Fujian,364012,CHN)

机构地区：[1]龙岩学院物理与机电工程学院,福建龙岩364012

出　　处：《固体电子学研究与进展》2022年第2期99-103,共5页Research & Progress of SSE

摘　　要：采用Pekar变分法研究了三角量子阱中磁极化子的Zeeman效应和Rashba效应,理论推导得到磁极化子基态能量的表达式。结果表明,磁极化子的基态能量不仅是波矢和磁场回旋共振频率的函数,而且还是电子面密度和电子-声子耦合强度的函数;由于晶体结构反演非对称性及磁场的影响,磁极化子能量发生Rashba自旋轨道分裂和Zeeman分裂;在强、弱磁场下,分别讨论了Rashba效应和Zeeman效应在能量分裂中所占的主导地位;由于声子的存在降低了极化子的总能量,使得极化子态比裸电子态更稳定。The Zeeman effect and Rashba effect of the magnetopolaron in a triangular quantum well were studied by the Pekar variational method.The expression of ground state energy of the mag-netopolaron was derived by theoretical deduction.The results show that the ground state energy of the magnetopolaron is not only a function of wave vector and magnetic field cyclotron resonance frequen-cy,but also a function of electron surface density and electron-phonon coupling strength.Due to the asymmetry of the crystal structure inversion and the influence of the magnetic field,the energy of the magnetopolaron undergoes Rashba spin-orbit splitting and Zeeman splitting.Under strong and weak magnetic fields,the dominant positions of Rashba effect and Zeeman effect in energy splitting are dis-cussed respectively.Because the existence of phonons reduces the total energy of the polaron,the po-laron state is more stable than the bare electron state.

关 键 词：ZEEMAN效应 Rashba效应 磁极化子 三角量子阱 

分 类 号：O469[理学—凝聚态物理]