Discovery of the Griffiths phase in the itinerant magnetic semiconductor Fe1-xCoxS2

被引：73

作者：

Guo, S. ^{[1
]}

Young, D. P. ^{[1
]}

Macaluso, R. T. ^{[2
]}

Browne, D. A. ^{[1
]}

Henderson, N. L. ^{[1
]}

Chan, J. Y. ^{[2
]}

Henry, L. L. ^{[3
]}

DiTusa, J. F. ^{[1
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA

[3] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.017209

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Critical points that can be suppressed to zero temperature are interesting because quantum fluctuations have been shown to dramatically alter electron gas properties. Here, the metal formed by Co doping the paramagnetic insulator FeS2, Fe1-xCoxS2 is demonstrated to order ferromagnetically at x > x(c)=0.01 +/- 0.005, where we observe unusual transport, magnetic, and thermodynamic properties. We show that this magnetic semiconductor undergoes a percolative magnetic transition with distinct similarities to the Griffiths phase, including singular behavior at x(c) and zero temperature.

引用

页数：4

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