Origin of Electromagnon Excitations in Multiferroic RMnO3

被引：157

作者：

Aguilar, R. Valdes ^{[1
]}

Mostovoy, M. ^{[2
]}

Sushkov, A. B. ^{[1
]}

Zhang, C. L. ^{[3
,4
]}

Choi, Y. J. ^{[3
,4
]}

Cheong, S-W. ^{[3
,4
]}

Drew, H. D. ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[2] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

[3] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 04期

关键词：

POLARIZATION;

D O I：

10.1103/PhysRevLett.102.047203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electromagnon excitations in multiferroic orthorhombic RMnO3 are shown to result from the Heisenberg coupling between spins despite the fact that the static polarization arises from the much weaker Dzyaloshinskii-Moriya exchange interaction. We present a model incorporating the structural characteristics of this family of manganites that is confirmed by far infrared transmission data as a function of temperature and magnetic field and inelastic neutron scattering results. A deep connection is found between the magnetoelectric dynamics of the spiral phase and the static magnetoelectric coupling in the collinear E phase of this family of manganites.

引用

页数：4

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