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Effect of a magnetic field on energy transfer of band states to the Mn2+ 3d shell in the CdMgTe matrix with ultrathin CdMnTe layers

机译:磁场对具有超薄CdMnTe层的CdMgTe基质中能带态能量转移到Mn2 + 3d壳层的影响

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摘要

The effect of external magnetic fields on two radiative (band-to-band and on-site) recombination channels in II-VI dilute magnetic semiconductors and related nanostructures has been considered. The 3d on-site emission of manganese ions in CdMgTe matrices containing periodic inclusions of CdMnTe narrow-band-gap layers with thicknesses of 0.5, 1.5, and 3.0 monolayers has been investigated in magnetic fields of up to 6 T. It has been shown that, in a magnetic field, luminescence of manganese ions weakens because of the decrease in the rate of spin-dependent excitation transfer from band states to the Mn2+ 3d shell. The maximum suppression of 3d luminescence has been observed in the matrix with a CdMnTe layer 3.0 monolayers thick. This indicates that the main factor responsible for the energy transfer is the internal field near the CdMnTe layers, which determines the magnetic splitting and spin polarization of band states.
机译:已经考虑了外部磁场对II-VI稀磁半导体和相关纳米结构中两个辐射(带间和现场)重组通道的影响。在高达6 T的磁场中,研究了CdMgTe基质中锰离子的3d现场发射,该基质含有周期性夹杂的CdMnTe窄带隙层,厚度为0.5、1.5和3.0单层。在磁场中,锰离子的发光减弱,这是因为自旋依赖性激发从能带态到Mn2 + 3d壳层的转移速率降低。在单层厚度为3.0的CdMnTe层的基体中,可以最大程度地抑制3d发光。这表明引起能量转移的主要因素是CdMnTe层附近的内部磁场,它决定了能带态的磁分裂和自旋极化。

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