Distributions of Conduction Electrons as Manifested in MAS NMR of Gallium Nitride

摘要

Magic-angle spinning(MAS)NMR of crystalline inorganic solids provides invaluable information about local chemical structure and is useful in inorganic synthetic chemistry because of its sensitivity to potential impurities in the sample.Perturbations to the local environment of a nuclear site can arise from changes in the disposition or identity of nearby atoms,for example.The chemical shift is typically the source of such structural information,although for quadrupolar nuclei(nuclear spin > 1/2),the nuclear quadrupole coupling constant is similarly informative.Thus,large chemical shift changes in the ~(71)Ga MAS NMR spectra of the important HI-V wide band gap semiconductor GaN have previously been attributed to structural effects of nitrogen vacancies.