Dynamical Disorder of π-Molecular Structures Induced by Proton Dynamics in an Organic Ferroelectric Compound

被引：15

作者：

Fujioka, J. ^{[1
]}

Horiuchi, S. ^{[2
]}

Kagawa, F. ^{[3
]}

Tokura, Y. ^{[1
,2
,3
,4
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058562, Japan

[3] Japan Sci & Technol Corp, ERATO, Multiferro Project, Tokyo 1138656, Japan

[4] RIKEN, Cross Correlated Mat Res Grp, Adv Sci Inst, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 19期

关键词：

INFRARED REFLECTIVITY; KH2PO4; SCATTERING; CRYSTAL; RAMAN; ACID;

D O I：

10.1103/PhysRevLett.102.197601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the optical response resulting from the proton-pi-electron-molecular-skeleton coupled dynamics in an organic ferroelectric 55DMBP-Hia. Upon the ferroelectric-to-paraelectric transition, almost all of the vibrational modes below 500 cm(-1) are anomalously blurred and amalgamated into the high-frequency tail of the polarization-relaxation mode. This indicates that the constituent molecular shape is no more well defined around T(C) due to the dynamical disorder of the pi-conjugated structure originating from proton delocalization on the intermolecular bifurcated hydrogen bond.

引用

页数：4

共 14 条

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[2]

[Anonymous], 1997, INTRO HYDROGEN BONDI

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