Direct Observation of the Proliferation of Ferroelectric Loop Domains and Vortex-Antivortex Pairs

被引：162

作者：

Chae, S. C. ^{[1
]}

Lee, N. ^{[1
]}

Horibe, Y. ^{[1
]}

Tanimura, M. ^{[3
]}

Mori, S. ^{[2
,4
]}

Gao, B. ^{[1
]}

Carr, S. ^{[1
]}

Cheong, S. -W. ^{[1
]}

机构：

[1] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

[2] Osaka Prefecture Univ, Dept Mat Sci, Sakai, Osaka 5998531, Japan

[3] NISSAN ARC Ltd, Res Dept, Yokosuka, Kanagawa 2370061, Japan

[4] CREST, JST, Sakai, Osaka 5998531, Japan

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 16期

基金：

美国国家科学基金会;

关键词：

PHASE-TRANSITIONS; 2-DIMENSIONAL SYSTEMS; YMNO3; DENSITY; GROWTH; MODEL;

D O I：

10.1103/PhysRevLett.108.167603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discovered stripe patterns of trimerization-ferroelectric domains in hexagonal REMnO3 (RE = Ho, ..., Lu) crystals (grown below ferroelectric transition temperatures (T-c), reaching up to 1435 degrees C), in contrast with the vortex patterns in YMnO3. These stripe patterns roughen with the appearance of numerous loop domains through thermal annealing just below T-c, but the stripe domain patterns turn to vortex-antivortex domain patterns through a freezing process when crystals cross T-c even though the phase transition appears to not be Kosterlitz-Thouless-type. The experimental systematics are compared with the results of our six-state clock model simulation and also the Kibble-Zurek mechanism for trapped topological defects.

引用

页数：5

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