Further investigations of the deep double donor magnesium in silicon
Further investigations of the deep double donor magnesium in silicon
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DOI：
10.1103/physrevb.98.045202
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发表时间：
2018-07-24
影响因子：
3.7
通讯作者：
Thewalt, M. L. W.
中科院分区：
文献类型：
--
作者：
Abraham, R. J. S.;DeAbreu, A.;Thewalt, M. L. W.
硅中替代硫族杂质的深双施主能级具有独特的光学特性，可以实现自旋/光子量子技术。硅中的间隙镁杂质（Mg-i）也是一种深层双施主，但尚未像硫属元素那样进行详细研究。在本文中，我们更详细地研究了天然硅和同位素富集 28-硅中的中性和单电离 Mg-i 吸收光谱。 1s(A(1)) 到 1s(T-2) 跃迁对于硫族元素来说非常强，并且是所提出的自旋/光子量子技术的核心，但无法检测到。我们观察到另一个双供体 (Mg-i*) 的存在，这可能是由于 Mg-i 的对称性降低而导致的，很可能是由于与另一种杂质络合所致。 Mg-i* 的中性物质揭示了通过温度依赖性研究检测到的异常低位基态水平。我们还观察到一个浅供体，我们将其识别为镁硼对。
The deep double donor levels of substitutional chalcogen impurities in silicon have unique optical properties which may enable a spin/photonic quantum technology. The interstitial magnesium impurity (Mg-i) in silicon is also a deep double donor but has not yet been studied in the same detail as have the chalcogens. In this paper, we look at the neutral and singly ionized Mg-i absorption spectra in natural silicon and isotopically enriched 28-silicon in more detail. The 1s(A(1)) to 1s(T-2) transitions, which are very strong for the chalcogens and are central to the proposed spin/photonic quantum technology, could not be detected. We observe the presence of another double donor (Mg-i*) that may result from Mg-i in a reduced symmetry configuration, most likely due to complexing with another impurity. The neutral species of Mg-i* reveal unusual low-lying ground state levels detected through temperature dependence studies. We also observe a shallow donor which we identify as a magnesium-boron pair.