Using infrared absorption spectroscopy, we have observed hydrogen local vibrational modes (LVMs) in arsenichyphen;doped ZnSe grown by metalorganic chemical vapor deposition (MOCVD). When hydrogen is used as a carrier gas, we find an absorption peak at 2165.6 cmminus;1, which we attribute to a bondhyphen;stretching mode of a hydrogen attached to an arsenic acceptor in a bondhyphen;centered orientation. With deuterium substituting the hydrogen carrier gas, we find an additional peak at 1557.1 cmminus;1with 1/3 the intensity of the hydrogen peak. The isotopic frequency ratio isr=vH/vD=1.3908, similar to values found in many hydrogen/deuteriumhyphen;related complexes. The larger area of the hydrogen peak indicates that most of the hydrogen comes from decomposition reactions involving the metalorganic molecules. The temperature dependent shift of the ZnSe:As,H mode is proportional to the lattice thermal energyU(T), a consequence of the anharmonic coupling between the LVMs and the lattice phonons.
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