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- W2783297067 abstract "Erbium was implanted with 160 keV at doses between 5×10 14 and 5×10 15 at/cm 2 into (0001) epitaxial GaN on sapphire and annealed at various temperatures between 600° and 1000° C. The RBS/Channeling technique was used to analyze the damage recovery during different annealing steps and to determine the lattice location of the implanted Er. For a sample implanted with 5×10 14 and annealed for 30 min at 600° C a complete overlap of the Er and Ga angular scans across the <0001> axis was observed, indicating that 100% of Er occupies substitutional sites. Measurements along the <10 1> channel show that Er is located on Ga sites. The damage recovery was slightly better for the samples co-implanted with the same dose of Oxygen in an overlapping profile (E=25 keV). However, a complete recovery of the damage caused by the implantation was not achieved. Samples implanted with higher Er and O doses (5×10 15 at/cm 2 ) and at the same energies as above were annealed at 600° for 30 min and at 900°, 1000° C for 120 s using a proximity cap. The higher dose caused an almost complete amorphisation of the surface layer. After annealing indications of epitaxial regrowth were observed, however, the substitutional fraction remains substantially lower and the damage recovery is less complete." @default.
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- W2783297067 date "1999-01-01" @default.
- W2783297067 modified "2023-10-17" @default.
- W2783297067 title "RBS Lattice Site Location and Damage Recovery Studies in GaN" @default.
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- W2783297067 doi "https://doi.org/10.1557/s1092578300003628" @default.
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