TY - JOUR
T1 - First-principles calculations of crystal structure, electronic structure and optical properties of Ba2RETaO6 (RE = Y, La, Pr, Sm, Gd)
AU - Zheng, Jiayi
AU - Wang, Song
AU - Gao, Lihong
AU - Ma, Zhuang
AU - Wang, Fuchi
N1 - Publisher Copyright:
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The crystal structure, electronic structure and optical properties of Ba2RETaO6 (RE = Y, La, Pr, Sm, Gd) have been studied by first-principles calculation. The calculated lattice parameters are in good agreement with the previously reported values. With increasing the atomic number of RE (i.e., the number of 4f electrons), the energy level of RE 4f bands becomes lower continuously. The relationship between the electronic structure and optical properties is explored based on first-principles calculation. The electron transitions between O 2p states, RE 4f states and Ta 5d states have a key effect on optical properties such as dielectric function, refractive index, absorption coefficient and reflectivity. The phase structures have great influence on the optical properties of Ba2SmTaO6 and Ba2GdTaO6, and the big variation of reflectivity induced from phase transition makes them have potential applications in the infrared radiation protection area.
AB - The crystal structure, electronic structure and optical properties of Ba2RETaO6 (RE = Y, La, Pr, Sm, Gd) have been studied by first-principles calculation. The calculated lattice parameters are in good agreement with the previously reported values. With increasing the atomic number of RE (i.e., the number of 4f electrons), the energy level of RE 4f bands becomes lower continuously. The relationship between the electronic structure and optical properties is explored based on first-principles calculation. The electron transitions between O 2p states, RE 4f states and Ta 5d states have a key effect on optical properties such as dielectric function, refractive index, absorption coefficient and reflectivity. The phase structures have great influence on the optical properties of Ba2SmTaO6 and Ba2GdTaO6, and the big variation of reflectivity induced from phase transition makes them have potential applications in the infrared radiation protection area.
UR - http://www.scopus.com/inward/record.url?scp=85044543381&partnerID=8YFLogxK
U2 - 10.1007/s10853-018-2253-0
DO - 10.1007/s10853-018-2253-0
M3 - Article
AN - SCOPUS:85044543381
SN - 0022-2461
VL - 53
SP - 9401
EP - 9410
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 13
ER -