Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-12-19
New J. Phys. 10 (2008) 013035
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 2 figures, 1 table
Scientific paper
10.1088/1367-2630/10/1/013035
The alkali hyperoxide KO$_2$ is a molecular analog of strongly-correlated systems, comprising of orbitally degenerate magnetic O$_2^-$ ions. Using first-principles electronic structure calculations, we set up an effective spin-orbital model for the low-energy \textit{molecular} orbitals and argue that many anomalous properties of KO$_2$ replicate the status of its orbital system in various temperature regimes.
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