Raman spectroscopy and Fermi resonance in Mn-doped ZnO bulk single crystal |
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| Authors: | B.N. Mavrin L.N. Demyanets |
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| Affiliation: | a Institute of Spectroscopy of RAS, Fizicheskaya, 5, Troitsk Moscow reg., 142190, Russia
b Institute of Crystallography of RAS, Leninsky pr. 59, Moscow, 119333, Russia |
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| Abstract: | For the first time the bulk oriented single crystals ZnO:Mn are obtained and the polarized Raman spectra are studied at excitation in the visible and near infrared regions. The resonance enhancing of the Raman scattering by Mn-related modes is found at the visible excitation due to the extra optical absorption in ZnO at the addition of Mn. It is shown that the resonance-enhanced overtone of Mn-related silent modes may be responsible for an appearance of anomalous modes of the A1 symmetry at 500-600 cm−1. A Fermi resonance between the overtone and one-phonon mode is analyzed. |
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| Keywords: | Mn-doped ZnO Raman spectra Fermi-resonance |
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