Raman spectra of folded acoustic phonons in short-period GaN/AlN superlattices as a tool for structure characterization

V. Yu Davydov, E. M. Roginskii, Yu E. Kitaev, A. N. Smirnov, I. A. Eliseyev, D. V. Nechaev, V. N. Jmerik, M. B. Smirnov

Research output

Abstract

The results of experimental and theoretical studies of phonon modes in short-period GaN/AlN superlattices grown by PA MBE on the (0001) Al2O3 substrate are reported. In the framework of Density Functional Theory and Elastic Continuum Model the lattice dynamics properties are studied of (GaN)m(AlN)n SLs (m+n≤24), where n and m are the number of monolayers. Good agreement between experiment and theory is found, which made it possible to establish unambiguously a relationship between the features observed in the Raman spectra and the microscopic nature of the acoustic phonon modes. The obtained results open new possibilities for analyzing the structural properties of GaN/AlN SLs by Raman spectroscopy.

Original languageEnglish
Article number012158
JournalJournal of Physics: Conference Series
Volume1697
Issue number1
DOIs
Publication statusPublished - 17 Dec 2020
EventInternational Conference PhysicA.SPb 2020 - ФТИ им. А.Ф. Иоффе, Санкт-Петербург
Duration: 19 Oct 202023 Oct 2020
http://physica.spb.ru/

Scopus subject areas

  • Physics and Astronomy(all)

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