Localized Vibrational Modes of Lithium in Lithium‐Diffused p‐Type GaAs

摘要

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.