Elastic strains and delocalized optical phonons in AlN/GaN superlattices
- Авторы: Pankin D.1,2, Smirnov M.1, Davydov V.3, Smirnov A.3, Zavarin E.3, Lundin W.3
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Учреждения:
- St. Petersburg State University
- Resource Center for Optical and Laser Materials Research
- Ioffe Physical–Technical Institute
- Выпуск: Том 50, № 8 (2016)
- Страницы: 1043-1048
- Раздел: Semiconductor Structures, Low-Dimensional Systems, and Quantum Phenomena
- URL: https://journals.rcsi.science/1063-7826/article/view/197616
- DOI: https://doi.org/10.1134/S1063782616080169
- ID: 197616
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Аннотация
In the context of the dielectric continuum model, a correlation is established between the frequencies of delocalized A(TO) and E(LO) phonons in the Raman spectra of short-period AlN/GaN superlattices and the ratio between the layer thicknesses in the structure. It is shown that elastic strains produced in the materials of the layer during superlattice growth only slightly influence the correlation dependence of the frequencies of A(TO) and E(LO) modes with high intensities in the Raman spectra on the structural parameter defining the ratios between the layer thicknesses. The results of calculations of the phonon frequencies are in good agreement with available experimental data and can be used for spectroscopic diagnostics of AlN/GaN superlattices.
Об авторах
D. Pankin
St. Petersburg State University; Resource Center for Optical and Laser Materials Research
Автор, ответственный за переписку.
Email: dmitrii.pankin@spbu.ru
Россия, St. Petersburg, 199034; St. Petersburg, 199034
M. Smirnov
St. Petersburg State University
Email: dmitrii.pankin@spbu.ru
Россия, St. Petersburg, 199034
V. Davydov
Ioffe Physical–Technical Institute
Email: dmitrii.pankin@spbu.ru
Россия, St. Petersburg, 194021
A. Smirnov
Ioffe Physical–Technical Institute
Email: dmitrii.pankin@spbu.ru
Россия, St. Petersburg, 194021
E. Zavarin
Ioffe Physical–Technical Institute
Email: dmitrii.pankin@spbu.ru
Россия, St. Petersburg, 194021
W. Lundin
Ioffe Physical–Technical Institute
Email: dmitrii.pankin@spbu.ru
Россия, St. Petersburg, 194021