Research Information System
PHYSICAL REVIEW B, vol.74, no.24, 2006 (SCI-Expanded, Scopus)
Muon spin depolarization measurements performed on powdered InN with zero applied magnetic field reveal several positively charged diamagnetic muonium centers. At low temperatures, the Mu(+) ground state is weakly relaxing with the characteristics of local tunneling motion, which changes to thermally activated diffusion above 350 K. Additional signals imply stationary metastable Mu(+) centers, which undergo successive activated transitions into the ground state at temperatures ranging from 250 to 400 K. Above 450 K, the Mu(+) diffusion is interrupted by trap and release events. The high-temperature trapped state is different from any of the low-temperature sites. The energies associated with metastable-to-stable site changes, detrapping transitions, and thermal diffusion are extracted and possible sites for the observed Mu(+) signals are discussed as a model for interstitial protons, H(+).