Electronic structure of delta-Pu and PuCoGa[sub 3] from photoemission and the mixed level model

Conference · Thu Jan 01 04:00:00 EST 2004

OSTI ID:977404

Joyce, J J ^[1]; Wills, J M ^[2]; Durakiewicz, T ^[3]; Butterfield, M T ^[4]; Guziewicz, E ^[5]; Arko, A J ^[6]; Moore, D P ^[7]; Morales, L A ^[8]; Eriksson, O ^[9]

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1. John Joseph
2. John M.
3. Tomasz
4. Martin T.
5. Elzbieta
6. Aloysius J.
7. David P.
8. Luis A.
9. Olle

The electronic structure of {delta}-phase Pu metal and the Pu-based superconductor PuCoGa{sub 5} is explored using photoelectron spectroscopy and a novel theoretical scheme. Excellent agreement between calculation and experiment defines a path forward for understanding electronic structure aspects of Pu-based materials. The photoemission results show two separate regions of 5f electron spectral intensity, one at the Fermi energy and another centered 1.2 eV below the Fermi level. A comparison is made between the photoemission data and five computational schemes for {delta}-Pu. The results for {delta}-Pu and PuCoGa{sub 5} indicate 5f electron behavior on the threshold between localized and itinerant and a broader framework for understanding the fundamental electronic properties of the Pu 5f levels in general within two configurations, one localized and one itinerant.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 977404
• Report Number(s): LA-UR-04-0267; LA-UR-04-267
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
ELECTRONIC STRUCTURE
FERMI LEVEL
GALLIUM ALLOYS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PLUTONIUM
PLUTONIUM ALLOYS