Frustrated Dipole Order Induces Noncollinear Proper Ferrielectricity in Two Dimensions

被引：67

作者：

Lin, Ling-Fang ^{[1
,2
]}

Zhang, Yang ^{[1
,2
]}

Moreo, Adriana ^{[2
,3
]}

Dagotto, Elbio ^{[2
,3
]}

Dong, Shuai ^{[1
]}

机构：

[1] Southeast Univ, Sch Phys, Nanjing 211189, Jiangsu, Peoples R China

[2] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 06期

基金：

中国国家自然科学基金;

关键词：

CRYSTAL-STRUCTURE; FERROELECTRICITY; POLARIZATION;

D O I：

10.1103/PhysRevLett.123.067601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Within Landau theory, magnetism and polarity are homotopic, displaying a one-to-one correspondence between most physical characteristics. However, despite widely reported noncollinear magnetism, spontaneous noncollinear electric dipole order as a ground state is rare. Here, a dioxydihalides family is predicted to display noncollinear ferrielectricity, induced by competing ferroelectric and antiferroelectric soft modes. This intrinsic of dipoles generates unique physical properties, such as Z(2) x Z(2) topological domains, atomic-scale dipole vortices, and negative piezoelectricity.

引用

页数：6

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