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- W1627832072 abstract "We report on first principles Self-Interaction Corrected LSD (SIC-LSD) calculations of electronic structure of LaMnO$_{3}$ in the cubic phase. We found a strong tendency to localisation of the Mn $e_{g}$ electron and to orbital ordering. We found the ground state to be orbitally ordered with a staggered order of $x^{2}-z^{2}$ and $y^{2}-z^{2}$ orbits in one plane and this order is repeated along the third direction. The difference in energy with a solution consisting of the ordering of $3x^{2}-r^{2}$ and $3y^{2}-r^{2}$ is, however, very small. The latter ordering is similar to the one observed both experimentally and theoretically in the real distorted system. The system is in the insulating A-type antiferromagnetic ordered state in both cases. The presence of orbital ordering means breaking of the cubic symmetry and without recourse to distortion. The latter may rather be the result of the orbital ordering but the symmetry of this ordering is determined by coupling to the lattice. The strong tendency to localisation of the $e_{g}$ electron in LaMnO$_{3}$ accounts for the survival of local distortions above the structural phase transition temperature." @default.
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- W1627832072 date "2005-12-29" @default.
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- W1627832072 title "Orbital ordering in cubic LaMnO<sub>3</sub>from first principles calculations" @default.
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- W1627832072 doi "https://doi.org/10.1088/1367-2630/7/1/257" @default.
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