Density functional studies of muonium in nitrogen-aggregate containing diamond: the MuX centre.

KM Etmimi, JP Goss, PR Briddon and AM Gsiea
Journal of Physics: Condensed Matter

Diamond has potential as a wide band-gap semiconductor with high intrinsic carrier mobility, thermal conductivity and hardness. Hydrogen is involved in electrically active defects in CVD diamond, and muonium, via μSR, can provide useful characterisation for the configurations adopted by H atoms in a crystalline material. We present the results of a computational investigation into the structure of the MuX centre proposed to be associated with nitrogen aggregates. We find that the propensity of hydrogen or muonium to chemically react with the lattice makes the correlation of MuX with nitrogen aggregates problematic, and suggest alternative structures.

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