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Samples of Mn-, Cd-, and Zn-doped GaAs were diffused to near compensation with Li. A number of Li-localized vibrational-mode absorption peaks have been observed. Three bands are present in Mn- and Cd-doped material. A simple model is proposed which is based upon interstitial Li paired with Mn or Cd, where the ion pairs are oriented along a 〈100〉 direction. In Zn-doped material four Li bands associated with Li-Zn complexes are observed. In this case the authors are unable to present a model consistent with existing experimental data.
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Lorimor et al. (1967) studied this question.
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