Stabilization of ferroelectricity in quantum paraelectrics by isotopic substitution

被引：50

作者：

Bussmann-Holder, A ^{[1
]}

Büttner, H

Bishop, AR

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Univ Bayreuth, Lehrstuhl Theoret Phys 1, D-95440 Bayreuth, Germany

[3] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 06期

关键词：

D O I：

10.1088/0953-8984/12/6/108

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

SrTiO3 and KTaO3 are incipient ferroelectrics whose phase transition temperature is suppressed by quantum fluctuations. The recent observation of induced ferroelectricity due to exchange of O-16 by O-18 (1999 Phys. Rev. Lett. 82 3540) is reproduced for the dielectric data by an anharmonic electron-phonon interaction model, and a first order phase transition is predicted. Furthermore it is shown that this isotope effect does not occur in KTaO3 since its local double-well potential is much shallower than that in SrTiO3.

引用

页码：L115 / L120

页数：6

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