期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 12, 页码 2601-2604出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.2601
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We confirm the recent prediction that interstitial protium may act as a shallow donor in zinc oxide, by direct spectroscopic observation of its muonium counterpart. On implantation into ZnO, positive muons -chemically analogous to protons in this context - form paramagnetic centers below about 40 K. The muon-electron contact hyperfine interaction, as well as the temperature and activation energy for ionization, imply a shallow level. Similar results for the cadmium chalcogenides suggest that such shallow donor states are generic to the II-VI compounds. The donor level depths should serve as a guide for the electrical activity of interstitial hydrogen.
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