Spectroscopic studies of 2H-PbI2(Mn) layered crystals

For the first time we studied Raman, exciton and EPR spectra of PbI2 layered crystals of 2H polytype doped with high concentration of Mn impurity. A novel type of Fermi resonance was found. The anomalous temperature shift of the exciton band n = 1 was registered. It was shown that this shift can be...

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Bibliographic Details
Published in:Physica Status Solidi (b) 2005-10, Vol.242 (12), p.2427-2432
Main Authors: Motsnyi, F. V., Dorogan, V. G., Kovalyuk, Z. D., Okulov, S. M., Yaremko, A. M.
Format: Article
Language:English
Subjects:
71.35.-y
76.30.Fc
78.30.Hv
78.40.Fy
Anharmonic lattice modes
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Electron paramagnetic resonance and relaxation
Electron states
Exact sciences and technology
Excitons and related phenomena
Lattice dynamics
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Phonons and vibrations in crystal lattices
Physics
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Summary:For the first time we studied Raman, exciton and EPR spectra of PbI2 layered crystals of 2H polytype doped with high concentration of Mn impurity. A novel type of Fermi resonance was found. The anomalous temperature shift of the exciton band n = 1 was registered. It was shown that this shift can be explained by means of anharmonic vibrations of layered lattice at T < 40 K and low‐frequency optical phonons at T > 40 K. The manifestation of single and exchange‐bound Mn2+ ions in EPR spectra was observed. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200540086