Charge-stripe order in the electronic ferroelectric LuFe2O4

被引：88

作者：

Zhang, Y. ^{[1
]}

Yang, H. X. ^{[1
]}

Ma, C. ^{[1
]}

Tian, H. F. ^{[1
]}

Li, J. Q. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.98.247602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The structural features of the charge ordering states in LuFe2O4 are characterized by in situ cooling transmission electron microscopy observations from 300 K down to 20 K. Two distinctive structural modulations, a major q(1)=(1/3,1/3,2) and a weak q(2)=q(1)/10+(0,0,3/2), have been well determined at the temperature of similar to 20 K. Systematic analysis demonstrates that the charges at low temperatures are well crystallized in a charge-stripe phase, in which the charge-density wave behavior in a nonsinusoidal fashion results in elemental electric dipoles for ferroelectricity. It is also noted that the charge ordering and ferroelectric domains often change markedly with lowering temperatures and yield a rich variety of structural phenomena.

引用

页数：4

共 22 条

[1] Compounds with the YbFe2O4 structure type:: Frustrated magnetism and spin-glass behavior [J].