Fermi-surface topology and field-dependent effective masses of the filled skutterudite compound PrOs4As12

We report magnetic-field-orientation dependent de Haas-van Alphen (dHvA) experiments on the filled skutterudites PrOs4As12 and LaOs4As12. The Fermi surfaces of the compounds are very similar and in reasonable agreement with bandstructure calculations for LaOs4As12 on a PrOs4As12 lattice. This sugges...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2008-04, Vol.403 (5-9), p.758-760
Main Authors: SINGLETON, J, HO, Pei-Chun, MAPLE, M. B, HARIMA, Hisatomo, GODDARD, P. A, HENKIE, Z
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diamagnetism, paramagnetism and superparamagnetism
Electron states
Exact sciences and technology
Fermi surface: calculations and measurements
effective mass, g factor
Magnetic properties and materials
Physics
Theories and models of many electron systems
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Summary:We report magnetic-field-orientation dependent de Haas-van Alphen (dHvA) experiments on the filled skutterudites PrOs4As12 and LaOs4As12. The Fermi surfaces of the compounds are very similar and in reasonable agreement with bandstructure calculations for LaOs4As12 on a PrOs4As12 lattice. This suggests that the 4f electrons are essentially localized in the paramagnetic phase of PrOs4As12. Whilst the properties of LaOs4As12 suggest a conventional nonmagnetic Fermi liquid, the effects of direct exchange and electron correlations cause dHvA beat frequencies and field-dependent quasiparticle masses in PrOs4As12.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2007.10.222