First evidence for charge ordering in NaV2O5 from Raman spectroscopy

被引：21

作者：

Konstantinovic, MJ

Popovic, ZV

Vasil'ev, AN

Isobe, M

Ueda, Y

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Katholieke Univ Leuven, Dept Phys, VSM Lab, B-3001 Louvain, Belgium

[3] Moscow MV Lomonosov State Univ, Low Temp Phys Dept, Moscow 119899, Russia

[4] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 112卷 / 07期

关键词：

crystal structure and symmetry; inelastic light scattering;

D O I：

10.1016/S0038-1098(99)00338-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We argue on the basis of symmetry selection rules and Raman scattering spectra that NaV2O5 undergoes a charge ordering phase transition at T-c = 34 K. Such a transition is characterized by the redistribution of the charges at the phase transition and corresponds to the change of the vanadium ions, from uniform V-4,V-5+ to two different V4+ and V5+ states. In the low temperature phase the V4+ ions are forming a "zig-zag" ladder structure along the b-axis, consistent with the symmetry of the P2/b space group. (C) 1999 Elsevier Science Ltd. All rights reserved.

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收藏

页码：397 / 402

页数：6

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