Mechanism of intrinsic dipole moment induction in quantum paraelectric SrTiO3

被引：5

作者：

Kawakami, Shuhei ^{[1
]}

Nakajima, Nobuo ^{[1
]}

Nakatake, Masashi ^{[2
]}

Kawamura, Naomi ^{[3
]}

Mizumaki, Masaichiro ^{[3
]}

Maruyama, Hiroshi ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Sci, Dept Phys Sci, Hiroshima 7398526, Japan

[2] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Hiroshima 7390046, Japan

[3] Japan Synchrotron Radiat Res Inst, SPring 8, Sayo, Hyogo 6795198, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2015年 / 54卷 / 10期

基金：

日本学术振兴会;

关键词：

OXYGEN-ISOTOPE EXCHANGE; ELECTRIC-FIELD; FERROELECTRICITY; PEROVSKITE; SURFACE; TIO2; GAS;

D O I：

10.7567/JJAP.54.10NC03

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We measure the Ti K beta resonant X-ray emission spectra of SrTiO3 in the quantum paraelectric phase. We find that charge transfer (CT) excitation is affected by temperature decrease and UV irradiation, which provides direct evidence of the fact that the induced electric dipole moment is derived from the Ti off-center displacement. The UV-assisted dipole moments are aligned parallel to the applied DC electric field, as inferred from the additional change in the CT peak. We conclude that the local polar region formed by UV irradiation evolves under DC field application at low temperature. (C) 2015 The Japan Society of Applied Physics

引用

页数：5

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