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Localized and Itinerant States in Actinide Materials

Published online by Cambridge University Press:  26 February 2011

J.J. Joyce ,
T. Durakiewicz ,
C. G. Olson ,
E. Guziewicz ,
K. S. Graham ,
D. P. Moore  and
L. A. Morales
J.J. Joyce
Affiliation:
jjoyce@lanl.gov, ., ., ., ., MD, ., United States
T. Durakiewicz
Affiliation:
tomasz@lanl.gov, Los Alamos National Laboratory, Condensed Matter & Thermal Physics Group, Los Alamos, NM, 87545, United States
C. G. Olson
Affiliation:
cgolson@facstaff.wisc.edu, Ames Laboratory, Iowa State University, Ames, IA, 50011, United States
E. Guziewicz
Affiliation:
guzel@ifpan.edu.pl, Polish Academy of Sciences, Institute of Physics, 02-668, Warszawa, N/A, Poland
K. S. Graham
Affiliation:
kgraham@lanl.gov, Los Alamos National Laboratory, Condensed Matter & Thermal Physics Group, Los Alamos, NM, 87545, United States
D. P. Moore
Affiliation:
dmoore@lanl.gov, Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, NM, 87545, United States
L. A. Morales
Affiliation:
lmorales@lanl.gov, Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, NM, 87545, United States
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Abstract

The electronic structure of single crystal UO2 and polycrystalline δ-Pu is examined using photoelectron spectroscopy. These two actinide materials exhibit properties consistent with the 5f electrons at the threshold between localized and itinerant character. The results for δ-Pu may be viewed as the 5f electrons exhibiting a dual nature with some fraction of the 5f levels localized and not participating in the bonding while the other fraction of 5f character is involved in bonding and hybridization with the conduction electrons. For UO2 where angle-resolved photoemission is available, one observes dispersion in the 5f features indicative of the 5f electrons being influenced by the periodic potential of the lattice rather than purely influenced by the site to which the 5f electrons are generally localized.

Keywords

actinidephotoemissionelectronic structure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 986: Symposium OO – Actinides 2006 – Basic Science, Applications and Technology , 2006 , 0986-OO01-04
Copyright
Copyright © Materials Research Society 2007

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