Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-02-16
The European Physical Journal B 53 23 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages 3 figures
Scientific paper
10.1140/epjb/e2006-00340-5
We have studied the orbital ordering (OO) in La0.5Sr1.5MnO4 and its soft x-ray resonant diffraction spectroscopic signature at the Mn L2, L3 edges. We have modelled the system in second quantization as a small planar cluster consisting of a central Mn atom, with the first neighbouring shells of oxygen and Mn atoms. For the effective Hamiltonian we consider Slater-Koster parameters, charge transfer and electron correlation energies obtained from previous measurements on manganites. We calculate the OO as a function of oxygen distortion and spin correlation used as adjustable parameters. Their contribution as a function of temperature is clearly distinguished with a good spectroscopic agreement.
der Laan van G.
Dhesi Sarnjeet S.
Mirone Alessandro
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