Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 444, Issue -, Pages 162-167Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2006.11.028
Keywords
delta-Pu; j-j coupling scheme; multipole
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We propose a multipole scenario to understand the absence of magnetism in delta-Pu on the basis of a microscopic model constructed from a j-j coupling scheme. In order to determine the multipole state, we employ a concept of the optimization of multipole susceptibility. By using an exact diagonalization technique for 4-site fcc lattice, we depict the phase diagram, including the states characterized by quadrupole and octupole fluctuations. We discuss the region in our phase diagram with possible relevance to the actual situation for delta-Pu. (c) 2006 Elsevier B.V. All rights reserved.
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