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Železný V, Chvostová D, Šimek D, et al. The variation of PbTiO3 bandgap at ferroelectric phase transition. J Phys Condens Matter. 2015;28(2):025501doi: 10.1088/0953-8984/28/2/025501.
Železný, V., Chvostová, D., Šimek, D., Máca, F., Mašek, J., Setter, N., & Hong Huang, Y. (2016). The variation of PbTiO3 bandgap at ferroelectric phase transition. Journal of physics. Condensed matter : an Institute of Physics journal, 28(2), 025501. https://doi.org/10.1088/0953-8984/28/2/025501
Železný, V, et al. "The variation of PbTiO3 bandgap at ferroelectric phase transition." Journal of physics. Condensed matter : an Institute of Physics journal vol. 28,2 (2016): 025501. doi: https://doi.org/10.1088/0953-8984/28/2/025501
Železný V, Chvostová D, Šimek D, Máca F, Mašek J, Setter N, Hong Huang Y. The variation of PbTiO3 bandgap at ferroelectric phase transition. J Phys Condens Matter. 2016 Jan 20;28(2):025501. doi: 10.1088/0953-8984/28/2/025501. Epub 2015 Dec 18. PMID: 26678862.
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J Phys Condens Matter. 2016 Jan 20;28(2):025501. doi: 10.1088/0953-8984/28/2/025501. Epub 2015 Dec 18.

The variation of PbTiO3 bandgap at ferroelectric phase transition.

Journal of physics. Condensed matter : an Institute of Physics journal

V Železný, D Chvostová, D Šimek, F Máca, J Mašek, N Setter, Yu Hong Huang

Affiliations

  1. Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic.

PMID: 26678862 DOI: 10.1088/0953-8984/28/2/025501

Abstract

Optical properties of the PbTiO3 thin films fabricated by chemical solution deposition have been measured with variable angle spectroscopic ellipsometry in the spectral range of 1-6 eV and in the temperature interval from room temperature to 950 K. The optical response functions and band gap energy were determined in the whole temperature range. The direct band gap varies from the value 3.88 eV at room temperature to the value 3.67 eV just above the phase transition. The temperature dependence of the film lattice parameters was also measured by x-ray and it shows a strong correlation with the band gap. The comparison of experimental data with ab initio electronic structure calculations simulating the temperature development of dielectric function and band gap is also presented.

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