Elastic anomalies of charge ordering in Yb4As3

被引：4

作者：

Goto, T ^{[1
]}

Nemoto, Y ^{[1
]}

Nakamura, S ^{[1
]}

Ochiai, A ^{[1
]}

Suzuki, T ^{[1
]}

机构：

[1] TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 98077,JAPAN

来源：

PHYSICA B | 1997年 / 230卷

关键词：

Yb4As3; charge ordering; elastic constants;

D O I：

10.1016/S0921-4526(96)00810-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Elastic constants of the mixed valence compound Yb4As3 with extremely low carrier 0.001 per Yb atom have been measured by the ultrasonic method. We found that the transverse C-44 mode exhibits a pronounced softening around the structural phase transition point at T-C = 292 K due to the charge ordering of Yb3+ ions along [111] direction. We interpret the softening of C-44 with the coupling of the strain epsilon(yz), epsilon(zx) and epsilon(xy) to charge fluctuation mode possessing the electric quadrupole moment in Yb3+ linear chain.

引用

页码：702 / 704

页数：3

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