[1] Jollet F., Noguera C., Thromat N., Gautier M. and Duraud J. -P., Phys. Rev. B 42 (12), 7587-7595(1990).
[2] Zheng J.X., Ceder G., Masixch T., Chim W.K. and Choi W.K. “Native point defects in yttria as a high-dielectric-constant gate oxide material: a first-principle study”, Phys. Rev.B 73, 104101 (2006).
[3] Jollet F., Noguera C., Gautier M., Thromat N., and Duraud J.P., Ceram. Soc., 74(2), 358-364 (1991).
[4] Mueller D. R., Ederer D. L., VanEk J., L.Obrien W., Dong Q. Y., Jia J. J., and Callcott T. A., Phys. Rev. B 54(21), 15034-15039(1996).
[5] Ching W.Y., Ouyang L. and Xu Y.N., “Electronic and optical properties of Y2SiO5 and Y2Si2O7 with comparisons to alfa-SiO2 and Y2O3”, Phys. Rev. B 67 245108-8 (2003).
[6] Xu Yong-Nian, Gu Zhong-quan, and Ching W. Y., Electronic, structural, and optical properties of crystalline yttria, Phys. Rev. B 56 14993(1997).
[7] Ramzan M., Li Y., Chimata R. and Ahuja R., “Electronic, mechanical and optical properties of Y2O3 with hybrid density functional (HSE06)”, Computational Materials Science 71 19-24 (2013).
[8] Badehian H., Salehi H. and Ghoohestani M., “First-principles study of elastic, structural, electronic, thermodynamical and optical properties of yttria (Y2O3) ceramic in cubic phase”, Journal of the American Ceramic Society, 1-9 (2013).
[9] Ahuja B. L., Sharma S., Heda N. L., Tiwari S., Kumar K., Meena B. S. and Bhatt S., “Electronic and optical properties of ceramic Sc2O3 and Y2O3: Compton spectroscopy and first principles calculations”, Journal of Physics and Chemistry of Solids 92 53-63 (2016).
[10] Zhu P.,Wang W. et al., “Optical properties ofEu+3 –Doped Y2O3 Nanotubes and Nanosheets synthesized by hydrothermal method”, IEEE Photonics Journal 10 4500210 (2018).
[11] Saddeek Y. B., Aly K., Abbady Gh., Afify N., Shaaban K. H. S. and Dahshan A., “Optical and structural evaluation of bismuth alumina-borate glasses doped with different amounts of (Y2O3)”, Journal of Non-Crystalline Solids 454 13-18 (2016).
[12] Xiaoyi S.and Yuchun Z., “Preparation and optical properties of Y2O3 /SiO2 Powder”, Rare Metals 30 33-38 (2011).
[13] Tessari G., Bettinelli M., Speghini A. et al., “Synthesis and optical properties of nanosized powders: lanthanide-doped Y2O3”, Applied Surface Science, 144-145, 686-689 (1999).
[14] Blaha P., Schwarz K., Wien2k, Vienna university of technology, Austria (2010).
[15] Toll J. S., “Causality and the Dispersion Relation: Logical Foundations”, Phys. Rev. 104 1760(1956).
[16] Landau L. D., Lifshitz E. M., Electrodynamics in Continuous Media, Pergamon Press, Oxford, (1960).
[17] Kramers H. A., Collected Science Papers, North Holland, Amsterdam (1956).
[18] Puschnig P. and Ambrosch-Draxl C., “Optical absorption spectra of semiconductors and insulators including electron-hole correlations: An ab-initio study within the LAPW method”, Phys. Rev. B 66 165105-1-9(2002).
[19] Yu P. and Cardona M., Contains problems to whose solution the student is carefully guided; Physical and intuitive approach enhance understanding; Includes extensive tables of material properties”, Fundamentals of Semiconductors Physics and Materials Properties, Springer-Verlag, Berlin (1999).
[20] Tomiki T., Tamashiro J., Tanahara Y., Yamada A., Fukutani H., Miyahara T., Kato H., Shin S., and Ishigame M., J. Vac. Sci. Technol. B 55 4543(1986).
[21] Thromat N., Noguera C., Gautier M., Jollet F., and Duraud J. P., “Electronic structure and atomic arrangement around Zr substituted for Y in Y2O3”, Phys. Rev. B 44 7904-7911 (1991).