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https://hdl.handle.net/10316/4408
Title: | Oxide muonics: A new compendium | Authors: | Cox, S. F. J. Lord, J. S. Cottrell, S. P. Gil, J. M. Alberto, H. V. Piroto Duarte, J. Vilão, R. C. Keeble, D. J. Davis, E. A. Keren, A. Scheuermann, R. Stoykov, A. Charlton, M. van der Werf, D. P. Gavartin, J. |
Keywords: | Muonium; Hydrogen doping | Issue Date: | 2006 | Citation: | Physica B: Condensed Matter. 374-375:(2006) 379-382 | Abstract: | A new survey of muonium states brings the total of binary non-magnetic oxides studied to 30, with normal muonium--the interstitially trapped atomic state--found in 15 of these. The number of shallow-donor states of the type known in ZnO now also totals 15, but there are hints of several others. Tantalizingly, the shallow-donor and deep-atomic states are found to coexist in several of the candidate high-permittivity dielectrics. Highly anisotropic states, resembling anomalous muonium in semiconductors and including examples of muonium trapped at oxygen vacancies, complete a spectrum of hyperfine parameters covering five powers of ten. Effective ionization temperatures range from 10 K for shallow to over 1000 K for deep states, with corresponding activation energies between several meV and several eV. The oxide band gap emerges as a parameter controlling the systematics of the deep-to-shallow transition for muonium and, by inference, monatomic hydrogen. | URI: | https://hdl.handle.net/10316/4408 | DOI: | 10.1016/j.physb.2005.11.106 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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