Reduction of the linewidths of deep luminescence centers in 28Si reveals fingerprints of the isotope constituents.
Dramatic reductions of the linewidths of well-known deep centers in 28Si reveal "isotopic fingerprints" of the constituents. The approximately 1014 meV Cu center, thought to be either a Cu pair or an isolated Cu, is shown to contain four Cu atoms, and the approximately 780 meV Ag center is shown to contain four Ag. The approximately 944 meV ;{*}Cu center, thought to be a different configuration of a Cu pair, in fact contains three Cu and one Ag, and a new two-Cu two-Ag center is found. The approximately 735 meV center, previously assigned to Fe, actually contains Au and three Cu. This suggests a family of four-atom (Cu, Ag, Au) centers.
Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6.
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Steger
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Yang
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Stavrias
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Thewalt
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Riemann
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Abrosimov
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Churbanov
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Gusev
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Bulanov
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Kovalev
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Kaliteevskii
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Godisov
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Becker
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Pohl