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Shallow donor state of hydrogen in In2O3 and SnO2: Implications for conductivity in transparent conducting oxides

Authors: P.D.C. King, R.L. Lichti, Y.G. Celebi, J.M. Gil, R.C. Vilao, H.V. Alberto, J. Piroto Duarte, D.J. Payne, R.G. Egdell, I. McKenzie, C.F. McConville, S.F.J. Cox and T.D. Veal

Ref.: Phys. Rev. B 80, 081201(R) (2009)

Abstract: Muonium, and by analogy hydrogen, is shown to form a shallow-donor state in In2O3 and SnO2. The paramagnetic charge state is stable below similar to 50 K in In2O3 and similar to 30 K in SnO2 which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the shallow-donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

DOI: 10.1103/PhysRevB.80.081201