Further investigations of the deep double donor magnesium in silicon
| Autor: | K. J. Morse, Adam DeAbreu, Yu. A. Astrov, A. N. Lodygin, Heinz-Wilhelm Hübers, Mike L. W. Thewalt, Rohan J. S. Abraham, V. B. Shuman, Stephanie Simmons, S.G. Pavlov, L. M. Portsel, Nickolay Abrosimov |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Condensed Matter - Materials Science Materials science Absorption spectroscopy Silicon Magnesium Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences chemistry.chemical_element silicon double donor 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Chalcogen Condensed Matter::Materials Science chemistry Impurity 0103 physical sciences spin/photonic quantum Technology 0210 nano-technology Ground state Spin (physics) Shallow donor |
| Popis: | 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 study 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. |
| Databáze: | OpenAIRE |
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