From unconventional insulating behavior towards conventional magnetism in the intermediate-valence compound SmB6

被引：45

作者：

Derr, J. ^{[1
]}

Knebel, G. ^{[1
]}

Braithwaite, D. ^{[1
]}

Salce, B. ^{[1
]}

Flouquet, J. ^{[1
]}

Flachbart, K. ^{[2
]}

Gabani, S. ^{[2
]}

Shitsevalova, N. ^{[3
]}

机构：

[1] CEA, Dept Rech Fondamentale Mat Condensee, SPSMS, F-38054 Grenoble 9, France

[2] Slovak Acad Sci, Ctr Low Temp Phys, SK-04401 Kosice, Slovakia

[3] Inst Problems Mat Sci, UA-252680 Kiev, Ukraine

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.77.193107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In intermediate valence compounds, the subtle quantum equilibrium of two microscopic configurations is at the origin of a very rich physics. SmB6 is a famous example as it displays an intriguing semiconducting behavior at low pressure and a magnetic phase at high pressure. New transport measurements on SmB6 under hydrostatic conditions show that the two phenomena are intimately linked. The insulating state vanishes just at the pressure (p = 10 GPa) where homogeneous long range magnetic order appears. A comparison to previous specific heat experiments clearly points out that a magnetic anomaly is observed in resistivity measurements when excellent hydrostatic conditions are realized. The particular sensitivity of SmB6 to pressure inhomogeneities may reflect the strong anisotropy in the band structure.

引用

页数：4

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