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The electron effective mass, me, and extent of exciton wave function, rexc, were derived in GaAs1−yNy (y=0.043%–0.5%) from magnetophotoluminescence measurements. With an increase in nitrogen concentration, we find that me and rexc undergo a rapid increase and squeezing, respectively, even for y≈0.1%. This quite early manifestation of nitrogen-induced localization effects imposes important constraints on existing theoretical models.
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Masia et al. (2003) studied this question.
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