Exchange energy dominated by large orbital spin-currents in $δ$-Pu

Details Exchange energy dominated by large orbital spin-currents in $δ$-Pu Exchange energy dominated by large orbital spin-currents in $δ$-Pu

2008-05-21

arxiv.org/abs/0805.3241v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 1 figure, 2 tables

Scientific paper

10.1103/PhysRevB.78.100404

The electronic structure of the anomalous $\delta$-phase of Pu is analyzed by a general and exact reformulation of the exchange energy of the $f$-shell. It is found that the dominating contribution to the exchange energy is a polarization of orbital spin-currents that preserves the time reversal symmetry, hence a non-magnetic solution in accordance with experiments. The analysis brings a unifying picture of the role of exchange in the $5f$-shell with its relatively strong spin-orbit coupling. The results are in good accordance with recent measurements of the branching ratio for the $d$ to $f$ transition in the actinides.

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