Mg-pair isoelectronic bound exciton identified by its isotopic fingerprint in Si28

  title={Mg-pair isoelectronic bound exciton identified by its isotopic fingerprint in 
  author={Rohan J. S. Abraham and A. DeAbreu and Kevin J. Morse and Valentina B. Shuman and Leonid М. Portsel and A. N. Lodygin and Yu. A. Astrov and Nikolay V. Abrosimov and S. G. Pavlov and H. W. Hubers and Stephanie Simmons and Mike L. W. Thewalt},
  journal={Physical Review B},
We use the greatly improved optical linewidths provided by highly enriched $^{28}$Si to study a photoluminescence line near 1017 meV previously observed in the luminescence spectrum of natural Si diffused with Mg, and suggested to result from the recombination of an isoelectronic bound exciton localized at a Mg-pair center. In $^{28}$Si this no-phonon line is found to be comprised of five components whose relative intensities closely match the relative abundances of Mg-pairs formed by random… Expand
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