HEAVY FERMION BEHAVIOR IN EXTREMELY LOW CARRIER CONCENTRATION SYSTEM YB4AS3

被引：172

作者：

OCHIAI, A ^{[1
]}

SUZUKI, T ^{[1
]}

KASUYA, T ^{[1
]}

机构：

[1] TOHOKU UNIV,FAC SCI,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 11期

关键词：

charge ordering; heavy fermion; Kondo effect; low carrier concentration; structural transition; Yb pnictides;

D O I：

10.1143/JPSJ.59.4129

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the series of Yb pnictides with anti-Th3P4 structure. The valence of Yb varies from about 2 of Yb4Bi3 to 2.25 of Yb4As3 with the decreasing weight of the pnictogen. In the case of Yb4As3, the 4f level is located around the band gap and the charge ordering below about 300 K has been observed. Further, in such a situation, we have observed a clear dense Kondo or heavy Fermion behavior in the resistivity, the magnetic susceptibility and the specific heat though the carrier concentration at 4.2 K is only about 0.001/Yb3+ion. Yb4As3 is a new heavy Fermion compound which inquires whether the heavy Fermion state needs free carriers. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

页码：4129 / 4141

页数：13

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