Vibrational properties of the LiNbO3 z-surfaces
S. Sanna, G. Berth, W. Hahn, A. Widhalm, A. Zrenner, W.G. Schmidt, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 58 (2011) 1751–1756.
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Abstract
The existence of localized vibrational modes both at the positive and at the negative LiNbO3 (0001) surface is demonstrated by means of first-principles calculations and Raman spectroscopy measurements. First, the phonon modes of the crystal bulk and of the (0001) surface are calculated within the density functional theory. In a second step, the Raman spectra of LiNbO3 bulk and of the two surfaces are measured. The phonon modes localized at the two surfaces are found to be substantially different, and are also found to differ from the bulk modes. The calculated and measured frequencies are in agreement within the error of the method. Raman spectroscopy is shown to be sensitive to differences between bulk and surface and between positive and negative surface. It represents therefore an alternative method to determine the surface polarity, which does not exploit the pyroelectric or piezoelectric properties of the material.
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Journal Title
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Volume
58
Issue
9
Page
1751-1756
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Sanna S, Berth G, Hahn W, Widhalm A, Zrenner A, Schmidt WG. Vibrational properties of the LiNbO3 z-surfaces. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 2011;58(9):1751-1756. doi:10.1109/tuffc.2011.2012
Sanna, S., Berth, G., Hahn, W., Widhalm, A., Zrenner, A., & Schmidt, W. G. (2011). Vibrational properties of the LiNbO3 z-surfaces. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 58(9), 1751–1756. https://doi.org/10.1109/tuffc.2011.2012
@article{Sanna_Berth_Hahn_Widhalm_Zrenner_Schmidt_2011, title={Vibrational properties of the LiNbO3 z-surfaces}, volume={58}, DOI={10.1109/tuffc.2011.2012}, number={9}, journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Sanna, S. and Berth, Gerhard and Hahn, W. and Widhalm, A. and Zrenner, Artur and Schmidt, W. G.}, year={2011}, pages={1751–1756} }
Sanna, S., Gerhard Berth, W. Hahn, A. Widhalm, Artur Zrenner, and W. G. Schmidt. “Vibrational Properties of the LiNbO3 Z-Surfaces.” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 58, no. 9 (2011): 1751–56. https://doi.org/10.1109/tuffc.2011.2012.
S. Sanna, G. Berth, W. Hahn, A. Widhalm, A. Zrenner, and W. G. Schmidt, “Vibrational properties of the LiNbO3 z-surfaces,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 58, no. 9, pp. 1751–1756, 2011.
Sanna, S., et al. “Vibrational Properties of the LiNbO3 Z-Surfaces.” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 58, no. 9, Institute of Electrical and Electronics Engineers (IEEE), 2011, pp. 1751–56, doi:10.1109/tuffc.2011.2012.
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