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Anharmonicity in several-polar-mode crystals: adjusting phonon self-energy of LO and TO modes in Al2O3and TiO2to fit infrared reflectivity
Open accessAbstract
The validity of a four-parameter semi-quantum (FPSQ) model to fit infrared reflectivity spectra of crystals having a large number of phonon branches is discussed in view of the results of anharmonic quantum theories. The form of the quantum damping function may indeed be simplified when the two-phonon density of states resembles a broad continuum in the vicinity of the resonance frequency. Infrared reflectivity data of corundum obtained at temperatures ranging from 77 to 1775K are fitted with the aid of the FPSQ model. The temperature dependence of damping of TO and LO modes is analysed and it is found that phonon lifetimes are essentially limited by anharmonic three-phonon coupling described by the cubic hamiltonian consistent with two qualitative arguments.
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Cited by
Optical phonons in methylammonium lead halide perovskites and implications for charge transport
Sendner, M., Nayak, P. K., Egger, D. A., Beck, S., Müller, C., Epding, B., Kowalsky, W., Kronik, L., Snaith, H. J., Pucci, A., et al. (2016) · Materials Horizons · doi:10.1039/c6mh00275g · Cited by 403
Temperature dependence of transverse- and longitudinal-optic modes in TiO2(rutile)
Gervais, F., & Piriou, B. (1974) · Physical Review B · doi:10.1103/physrevb.10.1642 · Cited by 260
Self-citationDirection-specific van der Waals attraction between rutile TiO 2 nanocrystals
Zhang, X., He, Y., Sushko, M. L., Liu, J., Luo, L., De Yoreo, J. J., Mao, S. X., Wang, C., & Rosso, K. M. (2017) · Science · doi:10.1126/science.aah6902 · Cited by 122
Metadata
- Authors
- Gervais, F., & Piriou, B.
- Venue
- Journal of Physics C: Solid State Physics
- Publisher
- IOP Publishing
- Published
- 1974-07-07
- Volume
- 7
- Issue
- 13
- Pages
- 2374-2386
- ISSN
- 0022-3719 (ISSN-L)
- OpenAlex
- W1979009850
- Cited by
- 319
- References
- 0
- FWCI
- 5.61
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Anharmonicity in several-polar-mode crystals: adjusting phonon self-energy of LO and TO modes in Al2O3and TiO2to fit infrared reflectivity. https://app.cochat.ai/papers/10.1088/0022-3719/7/13/017
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- Gervais, F., & Piriou, B. (1974). Anharmonicity in several-polar-mode crystals: adjusting phonon self-energy of LO and TO modes in Al2O3and TiO2to fit infrared reflectivity. Journal of Physics C: Solid State Physics. https://doi.org/10.1088/0022-3719/7/13/017
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