Structural phase transition and anti-quadrupolar ordering in PrFe4P12 and PrRu4P12

被引：30

作者：

Curnoe, SH

Harima, H

Takegahara, K

Ueda, K

机构：

[1] Univ Tokyo, Inst Solid State Phys, K Ueda Lab, Chiba 2778581, Japan

[2] Osaka Univ, Inst Sci & Ind Res, Osaka, Japan

[3] Hirosaki Univ, Dept Mat Sci & Technol, Hirosaki, Aomori, Japan

[4] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 31911, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2002年 / 312卷

关键词：

skutterudites; metal-insulator; structural phase transition;

D O I：

10.1016/S0921-4526(01)01261-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We show that the structural phase transition which occurs in PrFe4P12 and PrRu4P12 coincides with anti-quadrupolar ordering of the Pr 4f(2) electrons. Coupling between phonon modes of the displacements of the Fe/Ru ions and the Pr 4f2 ground state doublet leads to a symmetry lowering (1, 1, -2) type distortion of the Fe/Ru positions and a simultaneous splitting of the 42 doublet into eigenstates with quadrupole moments +/-8. The sign of both the distortion and the quadrupole moment alternate from site to site, resulting in anti-quadrupolar ordering. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：837 / 839

页数：3

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