A de Haas-van Alphen study of the filled skutterudite compounds PrOs4As12 and LaOs4As12

被引：18

作者：

Ho, Pei-Chun

Singleton, J.

Maple, M. B.

Harima, Hisatomo

Goddard, P. A.

Henkie, Z.

Pietraszko, A.

机构：

[1] Univ Calif San Diego, Inst Pure & Appl Phys Sci, Dept Phys, La Jolla, CA 92093 USA

[2] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA

[3] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

[4] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

[5] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

来源：

NEW JOURNAL OF PHYSICS | 2007年 / 9卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1088/1367-2630/9/8/269

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Comprehensive magnetic-field-orientation dependent studies of the susceptibility and de Haas-van Alphen effect have been carried out on single crystals of the filled skutterudites PrOs4As12 and LaOs4As12 using magnetic fields of up to 40 T. Several peaks are observed in the low-field susceptibility of PrOs4As12, corresponding to cascades of metamagnetic transitions separating the low-field antiferromagnetic and high-field paramagnetic metal ( PMM) phases. The de Haas-van Alphen experiments show that the Fermi-surface topologies of PrOs4As12 in its PMM phase and LaOs4As12 are very similar. In addition, they are in reasonable agreement with the predictions of bandstructure calculations for LaOs4As12 on the PrOs4As12 lattice. Both observations suggest that the Pr 4f electrons contribute little to the number of itinerant quasiparticles in the PMM phase. However, while the properties of LaOs4As12 suggest a conventional nonmagnetic Fermi liquid, the effects of direct exchange and electron correlations are detected in the PMM phase of PrOs4As12. For example, the

引用

页数：15

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[11] LDA+U method applied for f-electron systems [J].