Scaling Behavior and Beyond Equilibrium in the Hexagonal Manganites

被引：173

作者：

Griffin, S. M. ^{[1
]}

Lilienblum, M. ^{[1
]}

Delaney, K. T. ^{[2
]}

Kumagai, Y. ^{[1
]}

Fiebig, M. ^{[1
]}

Spaldin, N. A. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Mat, CH-8093 Zurich, Switzerland

[2] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW X | 2012年 / 2卷 / 04期

基金：

美国国家科学基金会;

关键词：

INFLATIONARY UNIVERSE; TOPOLOGICAL DEFECTS; PHASE-TRANSITIONS; SYMMETRY-BREAKING; VORTEX FORMATION; DYNAMICS; GENERATION; COSMOLOGY; VORTICES; ANALOG;

D O I：

10.1103/PhysRevX.2.041022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the improper ferroelectric phase transition in the multiferroic hexagonal manganites displays appropriate symmetry-breaking characteristics for testing the Kibble-Zurek mechanism originally proposed to describe early-universe phase transitions. We present an analysis of the Kibble-Zurek theory of topological defect formation applied to the hexagonal manganites, discuss the conditions determining the range of cooling rates in which Kibble-Zurek behavior is expected, and show that recent literature data are consistent with our predictions. Finally, we explore experimentally the crossover out of the Kibble-Zurek regime and find a surprising reversal of the scaling behavior. DOI: 10.1103/PhysRevX.2.041022

引用

页数：10

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