Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-05-12
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages 1 figure
Scientific paper
Magnetism of $UGe_2$ is due to the magnetic ordered moments of $5f$ uranium electrons. The strong spin-orbit coupling splits them into two groups. The magnetization is investigated in terms of two vector fields ${\bf M}_{1i}$ and ${\bf M}_{2i}$ which identify the local orientation of the magnetization of the two groups of $f$ electrons. Renormalized spin-wave theory, which accounts for the magnon-magnon interaction, and its extension are developed to describe two ferromagnetic phases in the system: low temperature large moment phase $0
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