Infrared dielectric functions and optical phonons of wurtzite YxAl1-xN (0 x 0.22)

N. Ben Sedrine, A. Zukauskaite, J. Birch, J. Jensen, L. Hultman, S. Schöche, M. Schubert, V. Darakchieva

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

YAlN is a new member of the group-III nitride family with potential for applications in next generation piezoelectric and light emitting devices. We report the infrared dielectric functions and optical phonons of wurtzite (0001) YxAl1-xN epitaxial films with 0 x 0.22. The films are grown by magnetron sputtering epitaxy on c-plane Al2O3 and their phonon properties are investigated using infrared spectroscopic ellipsometry and Raman scattering spectroscopy. The infrared-active E 1(TO) and LO, and the Raman active E 2 phonons are found to exhibit one-mode behavior, which is discussed in the framework of the MREI model. The compositional dependencies of the E 1(TO), E 2 and LO phonon frequencies, the high-frequency limit of the dielectric constant, , the static dielectric constant, , and the Born effective charge Z B are established and discussed.

Original languageEnglish (US)
Article number415102
JournalJournal of Physics D: Applied Physics
Volume48
Issue number41
DOIs
StatePublished - Sep 17 2015

Fingerprint

Phonons
wurtzite
phonons
permittivity
Infrared radiation
Permittivity
epitaxy
ellipsometry
nitrides
magnetron sputtering
Spectroscopic ellipsometry
Epitaxial films
Raman spectra
Epitaxial growth
Nitrides
Magnetron sputtering
Raman scattering
scattering
Spectroscopy
spectroscopy

Keywords

  • YAlN
  • infrared dielectric function
  • phonons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Ben Sedrine, N., Zukauskaite, A., Birch, J., Jensen, J., Hultman, L., Schöche, S., ... Darakchieva, V. (2015). Infrared dielectric functions and optical phonons of wurtzite YxAl1-xN (0 x 0.22). Journal of Physics D: Applied Physics, 48(41), [415102]. https://doi.org/10.1088/0022-3727/48/41/415102

Infrared dielectric functions and optical phonons of wurtzite YxAl1-xN (0 x 0.22). / Ben Sedrine, N.; Zukauskaite, A.; Birch, J.; Jensen, J.; Hultman, L.; Schöche, S.; Schubert, M.; Darakchieva, V.

In: Journal of Physics D: Applied Physics, Vol. 48, No. 41, 415102, 17.09.2015.

Research output: Contribution to journalArticle

Ben Sedrine, N, Zukauskaite, A, Birch, J, Jensen, J, Hultman, L, Schöche, S, Schubert, M & Darakchieva, V 2015, 'Infrared dielectric functions and optical phonons of wurtzite YxAl1-xN (0 x 0.22)', Journal of Physics D: Applied Physics, vol. 48, no. 41, 415102. https://doi.org/10.1088/0022-3727/48/41/415102
Ben Sedrine N, Zukauskaite A, Birch J, Jensen J, Hultman L, Schöche S et al. Infrared dielectric functions and optical phonons of wurtzite YxAl1-xN (0 x 0.22). Journal of Physics D: Applied Physics. 2015 Sep 17;48(41). 415102. https://doi.org/10.1088/0022-3727/48/41/415102
Ben Sedrine, N. ; Zukauskaite, A. ; Birch, J. ; Jensen, J. ; Hultman, L. ; Schöche, S. ; Schubert, M. ; Darakchieva, V. / Infrared dielectric functions and optical phonons of wurtzite YxAl1-xN (0 x 0.22). In: Journal of Physics D: Applied Physics. 2015 ; Vol. 48, No. 41.
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