Raman study of the vibrational modes in ZnGeN2 (0001)

Eric W. Blanton, Mark Hagemann, Keliang He, Jie Shan, Walter R.L. Lambrecht, Kathleen Kash

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A Raman spectroscopy study was carried out on ZnGeN2 hexagonal single crystal (0001)-oriented platelets obtained by reaction of gaseous ammonia with a Zn-Ge-Sn liquid alloy at 758 °C. The sample geometry allowed measurement of the A2 and A1 Raman modes. First-principles calculations of the spectra were carried out using an improved pseudopotential. Measurements with crossed polarizers yielded spectra that agreed well with first-principles calculations of the A2 modes. Measurements with parallel polarizers should in principle provide the A1L modes. However, for most of the Raman modes, the LO-TO splitting was calculated to be smaller than could be resolved experimentally, and for the few modes which were predicted to have larger LO-TO splittings, the LO mode was not observed. This absence is tentatively explained in terms of overdamped LO-plasmon coupling.

Original languageEnglish (US)
Article number055704
JournalJournal of Applied Physics
Volume121
Issue number5
DOIs
StatePublished - Feb 7 2017

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vibration mode
polarizers
liquid alloys
platelets
pseudopotentials
ammonia
Raman spectroscopy
single crystals
geometry

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Blanton, E. W., Hagemann, M., He, K., Shan, J., Lambrecht, W. R. L., & Kash, K. (2017). Raman study of the vibrational modes in ZnGeN2 (0001). Journal of Applied Physics, 121(5), [055704]. https://doi.org/10.1063/1.4975040
Blanton, Eric W. ; Hagemann, Mark ; He, Keliang ; Shan, Jie ; Lambrecht, Walter R.L. ; Kash, Kathleen. / Raman study of the vibrational modes in ZnGeN2 (0001). In: Journal of Applied Physics. 2017 ; Vol. 121, No. 5.
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Blanton, EW, Hagemann, M, He, K, Shan, J, Lambrecht, WRL & Kash, K 2017, 'Raman study of the vibrational modes in ZnGeN2 (0001)', Journal of Applied Physics, vol. 121, no. 5, 055704. https://doi.org/10.1063/1.4975040

Raman study of the vibrational modes in ZnGeN2 (0001). / Blanton, Eric W.; Hagemann, Mark; He, Keliang; Shan, Jie; Lambrecht, Walter R.L.; Kash, Kathleen.

In: Journal of Applied Physics, Vol. 121, No. 5, 055704, 07.02.2017.

Research output: Contribution to journalArticle

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Blanton EW, Hagemann M, He K, Shan J, Lambrecht WRL, Kash K. Raman study of the vibrational modes in ZnGeN2 (0001). Journal of Applied Physics. 2017 Feb 7;121(5). 055704. https://doi.org/10.1063/1.4975040