Infrared dielectric functions and phonon modes of wurtzite Mg xZn1-xO(x≤0.2)

C. Bundesmann, M. Schubert, D. Spemann, T. Butz, M. Lorenz, E. M. Kaidashev, M. Grundmann, N. Ashkenov, H. Neumann, G. Wagner

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Abstract

Infrared dielectric function spectra and phonon modes with polarization parallel and perpendicular to the c axis of high quality, highly relaxed, and single crystalline wurtzite MgxZn1-xO films with 0≤x≤0.2 prepared by pulsed-laser deposition on c-plane sapphire substrates were obtained from infrared spectroscopic ellipsometry (380-1200cm -1) and Raman scattering studies. A two-mode behavior is found for the modes with E1 symmetry, a lattice mode and an impurity-type mode are obtained for the A1 symmetry phonons. Model dielectric function spectra will become useful for future infrared ellipsometry analysis of complex MgxZn1-xO-based heterostructures.

Original languageEnglish (US)
Pages (from-to)2376-2378
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number13
DOIs
StatePublished - Sep 23 2002

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Bundesmann, C., Schubert, M., Spemann, D., Butz, T., Lorenz, M., Kaidashev, E. M., Grundmann, M., Ashkenov, N., Neumann, H., & Wagner, G. (2002). Infrared dielectric functions and phonon modes of wurtzite Mg xZn1-xO(x≤0.2). Applied Physics Letters, 81(13), 2376-2378. https://doi.org/10.1063/1.1509862