The luminescences of zinc-blende MnTe epitaxial films are respectively excited by a laser and deuterium lamp to study ${\mathrm{Mn}}^{2+}d\text{-}d$ multiplets transitions. Besides the inclusion of the band gap, all other excited states related to ${\mathrm{Mn}}^{2+}d\text{-}d$ transitions including ${}^4{T}_1({}^{4}G)$, ${}^4{T}_2({}^{4}G)$, ${}^4{A}_1[{}^{4}E({}^{4}G)]$, ${}^4{T}_2({}^{4}D)$, ${}^{4}E({}^{4}D)$, and ${}^2{T}_2({}^{2}I)$ are observed. The shift and broadening of the ${}^4{T}_1({}^{4}G)$ and ${}^4{T}_2({}^{4}G)$ lines with increasing temperature are described by the electron–phonon coupling. Step-like energy and intensity shifts for the ${}^4{A}_1[{}^{4}E({}^{4}G)]$, ${}^4{T}_2({}^{4}D)$, ${}^{4}E({}^{4}D)$, and ${}^2{T}_2({}^{2}I)$ transitions occur in the vicinity of the Néel point, which can be ascribed to the different spin-ordering-induced energy relaxation in ground and excited states of ${\mathrm{Mn}}^{2+}d\text{-}d$ multiplets, and these transitions show temperature independence and weak quenching.

中文翻译：

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掺锌MnTe外延膜的Mn ²⁺ d-d多重跃迁的光致发光光谱：激光和氘灯激发研究

掺锌MnTe外延膜的发光分别由激光和氘灯激发进行研究 ${锰}^{\mathrm{2个}+}d\text{--}d$多重转换。除带隙外，所有其他激发态与${锰}^{\mathrm{2个}+}d\text{--}d$ 过渡包括 ${}^4{Ť}_{\mathrm{1个}}（{}^{4}G）$， ${}^4{Ť}_{\mathrm{2个}}（{}^{4}G）$， ${}^4{\mathrm{一个}}_{\mathrm{1个}}[{}^{4}E（{}^{4}G）]$， ${}^4{Ť}_{\mathrm{2个}}（{}^{4}d）$， ${}^{4}E（{}^{4}d）$， 和 ${}^{\mathrm{2个}}{Ť}_{\mathrm{2个}}（{}^{\mathrm{2个}}\mathrm{一世}）$被观察到。的转变和拓宽${}^4{Ť}_{\mathrm{1个}}（{}^{4}G）$ 和 ${}^4{Ť}_{\mathrm{2个}}（{}^{4}G）$电子-声子耦合描述了温度升高的谱线。阶梯状的能量和强度移动${}^4{\mathrm{一个}}_{\mathrm{1个}}[{}^{4}E（{}^{4}G）]$， ${}^4{Ť}_{\mathrm{2个}}（{}^{4}d）$， ${}^{4}E（{}^{4}d）$， 和 ${}^{\mathrm{2个}}{Ť}_{\mathrm{2个}}（{}^{\mathrm{2个}}\mathrm{一世}）$ 跃迁发生在Néel点附近，可以归因于基态和激发态的不同自旋有序诱导的能量弛豫 ${锰}^{\mathrm{2个}+}d\text{--}d$ 多重，并且这些转变显示出温度无关性和弱淬灭。