Simplifying strong electronic correlations in uranium: Localized uranium heavy-fermion UM(2)Zn(20) (M = Co, Rh) compounds

Bauer, E. D.; Wang, C.; Fanelli, V. R.; Lawrence, J. M.; Goremychkin, E. A.; de Souza, N. R.; Ronning, F.; Thompson, J. D.; Silhanek, Alejandro; Vildosola, V.; Lobos, A. M.; Aligia, A. A.; Bobev, S.; Sarrao, J. L.

doi:10.1103/PhysRevB.78.115120

Article (Scientific journals)

Simplifying strong electronic correlations in uranium: Localized uranium heavy-fermion UM(2)Zn(20) (M = Co, Rh) compounds

Bauer, E. D.; Wang, C.; Fanelli, V. R. et al.

2008 • In Physical Review. B, Condensed Matter, 78 (11)

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https://hdl.handle.net/2268/102556

DOI
10.1103/PhysRevB.78.115120

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Keywords :

heavy fermions; Kondo

Abstract :

[en] The physical properties including magnetic susceptibility, magnetization, specific heat, and dynamic susceptibility chi ''(E) are reported for single crystals of the cubic UM(2)Zn(20) (M = Co, Rh) materials. Maxima in the thermodynamic data at T(max) similar to 10 K for both compounds and a broad peak in chi ''(E) at 5 K in UCo(2)Zn(20) of width Gamma=5 meV indicate a heavy-fermion state characterized by a Kondo temperature T(K) similar to 20-30 K arising from weak hybridization of f- and conduction-electron states. Anderson impurity model fits to the data in the Kondo limit including crystalline electric-field effects corroborate an ionic-like uranium electronic configuration in UM(2)Zn(20).

Disciplines :

Physics

Author, co-author :

Bauer, E. D.

Wang, C.

Fanelli, V. R.

Lawrence, J. M.

Goremychkin, E. A.

de Souza, N. R.

Ronning, F.

Thompson, J. D.

Silhanek, Alejandro ; Katholieke Universiteit Leuven - KUL

Vildosola, V.

More authors (4 more)

Language :

English

Title :

Simplifying strong electronic correlations in uranium: Localized uranium heavy-fermion UM(2)Zn(20) (M = Co, Rh) compounds

Publication date :

2008

Journal title :

Physical Review. B, Condensed Matter

ISSN :

0163-1829

eISSN :

1095-3795

Publisher :

American Institute of Physics, New York, United States - New York

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 10 November 2011

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