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- W2023846467 abstract "We apply Laplace deep-level transient spectroscopy (LDLTS) in situ after low-temperature proton implantation into crystalline $n$-type germanium and identify a deep metastable donor center. The activation energy of the donor emission is $ensuremath{sim}110phantom{rule{0.3em}{0ex}}text{meV}$ when extrapolated to zero electric field. We obtain the split patterns of the emission signal for uniaxial stress applied along three major crystal directions $⟨100⟩$, $⟨110⟩$, and $⟨111⟩$, and conclude that the symmetry of the center is trigonal. We compare the annealing characteristics with those of bond-center hydrogen in silicon and with those of a trigonal center in germanium previously identified as bond-center hydrogen by in situ local-mode infrared absorption spectroscopy. From this comparison it is concluded that the observed donor emission originates from bond-center hydrogen. Infrared absorption also revealed another trigonal center tentatively ascribed to hydrogen occupying an antibonding configuration. A search for a corresponding deep level (as a hole or electron trap) failed, indicating that such level must be near midgap or resonant with (close to) the valence band." @default.
- W2023846467 created "2016-06-24" @default.
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- W2023846467 date "2004-06-28" @default.
- W2023846467 modified "2023-10-09" @default.
- W2023846467 title "Donor level of bond-center hydrogen in germanium" @default.
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- W2023846467 doi "https://doi.org/10.1103/physrevb.69.245207" @default.
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