arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1509.07136cond-mat.mes-hall
收藏

Mn δ掺杂GaAs势垒InGaAs量子阱的电学和光学性质

Electronic and optical properties of InGaAs quantum wells with Mn-delta-doping GaAs barriers

Udson C. Mendes, M. A. G. Balanta, Maria J. S. P. Brasil, José A. Brum

摘要:

本文报道了势垒掺杂锰的InGaAs量子阱的电子结构和光学性质。我们采用自旋-密度泛函理论,在有外磁场存在的情况下,在包络函数和有效质量近似下计算了电子态和光发射。在低磁场下(B < 5 T),朗道能级的磁振荡主要由空穴自旋和Mn自旋之间的磁相互作用引起,而在高磁场下,空穴气的自旋极化是主要的效应.我们的研究结果还表明,门电压显着改变发射能量的磁振荡,并可能是一个外部控制参数的系统的磁性。最后讨论了朗道能级振荡对发射光谱的影响,并与已有的实验结果进行了比较。

英文摘要:

We present here the electronic structure and optical properties of InGaAs quantum wells with barrier doped with Manganese. We calculated the electronic states and optical emission within the envelope function and effective mass approximations using the spin-density functional theory in the presence of an external magnetic field. We observe magneto-oscillations of the Landau levels at low-magnetic fields (B < 5 T) that are dominated by the magnetic interaction between holes spin and Mn spin, while at high magnetic fields the spin-polarization of the hole gas is the dominant effect. Our results also show that a gate voltage alter significantly the magneto-oscillations of the emission energy and may be an external control parameter for the magnetic properties of the system. Finally, we discuss the influence of the Landau Levels oscillations in the emission spectra and compare with available experimental.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑