Lattice dynamics of multiferroic BiFeO3 studied by inelastic x-ray scattering

被引：23

作者：

Borissenko, Elena ^{[1
]}

Goffinet, Marco ^{[2
]}

Bosak, Alexei ^{[1
]}

Rovillain, Pauline ^{[3
,4
]}

Cazayous, Maximilien ^{[5
]}

Colson, Dorothee ^{[6
]}

Ghosez, Philippe ^{[2
]}

Krisch, Michael ^{[1
]}

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[2] Univ Liege B5, B-4000 Liege, Belgium

[3] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

[4] ANSTO, Bragg Inst, Kirrawee Dc, NSW 2234, Australia

[5] Univ Paris 07, Lab Mat & Phenomenes Quant, F-75221 Paris 05, France

[6] CEA Saclay, Serv Phys Etat Condense, Gif Sur Yvette, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 10期

关键词：

BISMUTH FERRITE; RAMAN; CRYSTAL;

D O I：

10.1088/0953-8984/25/10/102201

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report an experimental study of the phonon dispersion in BiFeO3 single crystals at ambient conditions by inelastic x-ray scattering (IXS). The phonon dispersions were recorded along several symmetry directions up to 35 meV. Our results compare favorably with first-principles calculations performed using density functional theory (DFT) within the local-density approximation (LDA). We resolve a discrepancy concerning the symmetry of the optical phonon branches observed by Raman spectroscopy, determine the energy of the lowest Raman and infrared silent mode, and derive a subset of the elastic moduli of BiFeO3.

引用

页数：7

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