Vibrational spectroscopy of arsenic-hydrogen complexes in ZnSe
- Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
- Center for Advanced Materials, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Using infrared absorption spectroscopy, we have observed hydrogen local vibrational modes (LVMs) in arsenic-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 cm{sup {minus}1}, which we attribute to a bond-stretching mode of a hydrogen attached to an arsenic acceptor in a bond-centered orientation. With deuterium substituting the hydrogen carrier gas, we find an additional peak at 1557.1 cm{sup {minus}1} with 1/3 the intensity of the hydrogen peak. The isotopic frequency ratio is {ital r}={ital v}{sub H}/{ital v}{sub D}=1.3908, similar to values found in many hydrogen/deuterium-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 energy {ital U}({ital T}), a consequence of the anharmonic coupling between the LVMs and the lattice phonons.
- Research Organization:
- Lawrence Berkeley National Laboratory
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 284638
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 68; ISSN 0003-6951; ISSN APPLAB
- Country of Publication:
- United States
- Language:
- English
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