Journal ArticleDOI
Kondo insulating behaviour in the filled skutterudite compound CeOs4Sb12
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TLDR
The filled skutterudite CeOs4Sb12 and its nonmagnetic analogue LaOss4sb12 have been synthesized in single-crystal form using the molten-metal-flux growth technique with Sb flux as discussed by the authors.Abstract:
The filled skutterudite CeOs4Sb12 and its nonmagnetic analogue LaOs4Sb12 have been synthesized in single-crystal form using the molten-metal-flux growth technique with Sb flux. Electrical resistivity measurements on CeOs4Sb12 indicate that it is a Kondo insulator with an energy gap of ΔE/kB~10 K. Lattice parameter and magnetic susceptibility measurements suggest that the Ce ions are trivalent in CeOs4Sb12. Specific heat and magnetization measurements reveal an enhanced value of the electronic specific heat coefficient γ~92 mJ mol-1 K-2 and Pauli susceptibility, reminiscent of a moderately heavy-fermion material.read more
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Magnetic Phase Diagram of the Heavy Fermion Superconductor PrOs4Sb12
TL;DR: In this article, the authors investigated the magnetic phase diagram of the first Pr-based heavy fermion superconductor PrOs 4 Sb 12 by means of high-resolution dc magnetization measurements in low temperatures down to 0.06 K.
Journal ArticleDOI
Heavy-fermion behavior, crystalline electric field effects, and weak ferromagnetism in Sm Os 4 Sb 12
W. M. Yuhasz,N. A. Frederick,Pei-Chun Ho,Nicholas P. Butch,B. J. Taylor,T. A. Sayles,M. B. Maple,Jon Betts,A. H. Lacerda,Peter Rogl,Gerald Giester +10 more
TL;DR: In this paper, the x-ray diffraction, specific-heat, electrical resistivity, and magnetization measurements were used to characterize a single-crystal compound with lattice parameter $a=9.
Journal ArticleDOI
Rattling-Induced Superconductiviy in the β-Pyrochlore Oxides AOs2O6
TL;DR: In this paper, the superconducting properties of two β-pyrochlore oxides, CsOs 2 O 6 and RbO 6, were studied by thermodynamic and transport measurements using high-quality single crystals.
Journal ArticleDOI
Rattling-Induced Superconductiviy in the Beta-Pyrochlore Oxides AOs2O6
TL;DR: In this article, the superconducting properties of two beta-pyrochlore oxides, CsOs2O6 and RbO6, were studied by thermodynamic and transport measurements using high-quality single crystals.
References
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Journal ArticleDOI
Filled skutterudite antimonides : electron crystals and phonon glasses
TL;DR: In this paper, the transport properties of both filled and unfilled skutterudite compounds are analyzed using standard semiconductor transport models, showing that the filled compounds exhibit larger effective masses and smaller mobilities than the analogous unfilled compounds.
Journal ArticleDOI
LaFe4P12 with filled CoAs3‐type structure and isotypic lanthanoid–transition metal polyphosphides
W. Jeitschko,D. Braun +1 more
TL;DR: In this paper, the structure of LaFe4Pl2 was determined from single-crystal counter data by Patterson and Fourier methods and refined to R = 0.028 for 193 unique structure factors.
Journal ArticleDOI
Low temperature properties of the filled skutterudite CeFe4Sb12
TL;DR: CeFe4Sb12 is a member of a class of advanced thermoelectric materials as mentioned in this paper, and its properties at low temperature have been evaluated in order to evaluate its potential for such applications.
Journal ArticleDOI
Heavy fermion semiconductors
TL;DR: In this paper, the authors review the properties of heavy fermion semiconductors and show how they can be interpreted in terms of an electronic band structure, with a temperature dependent hybridization gap together with temperature dependent quasi-particle lifetimes.
Journal ArticleDOI
Continuous and Discontinuous Semiconductor-Metal Transition in Samarium Monochalcogenides Under Pressure
TL;DR: In this paper, the authors show that the semiconductor-to-metal transition in Sm chalcogenides occurs discontinuously at 6.5 kbar at room temperature, whereas such a transition takes place continuously over a broad pressure range in SmTe and SmSe.
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