Temperature dependence of electronic structure on the ferroelectric phase transition of BaTiO3

被引：3

作者：

Tezuka, Yasuhisa ^{[1
]}

Nozawa, Shunsuke ^{[2
]}

Nakajima, Nobuo ^{[3
]}

Iwazumi, Toshiaki ^{[4
]}

机构：

[1] Hirosaki Univ, Grad Sch Sci & Technol, 3 Bunkyo Cho, Hirosaki, Aomori 0368561, Japan

[2] Inst Mat Struct Sci, Photon Factory, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[3] Hiroshima Univ, Grad Sch Adv Sci & Engn, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan

[4] Osaka Prefecture Univ, Grad Sch Engn, Sakai, Osaka 5998531, Japan

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 23期

基金：

日本学术振兴会;

关键词：

ABSORPTION-SPECTRA;

D O I：

10.1103/PhysRevB.104.235148

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

X-ray Raman scattering spectra of ferroelectric BaTiO3 were measured under excitation around the Ti Kabsorption edge. Density of states of the unoccupied Ti 3d state was measured using Ti 2p core excitations. Anisotropy was observed in the ferroelectric phase with respect to spontaneous polarization direction. This anisotropy decreased with rising temperature and vanished in the paraelectric phase. Experimental results showed the ion displacement and electronic structure are closely related, and the hybridization between Ti 3d and O 2p states affects the ferroelectric phase transition.

引用

页数：7

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