Mott-Hubbard versus charge-transfer behavior in LaSrMnO4 studied via optical conductivity

  title={Mott-Hubbard versus charge-transfer behavior in LaSrMnO4 studied via optical conductivity},
  author={Andreas Gossling and Maurits W. Haverkort and M. Benomar and H. F. Wu and Daniel Senff and T. Moller and Markus Braden and John A. Mydosh and Markus Gruninger},
  journal={Physical Review B},
figuration 10Dq= 1.2 eV, eg= 1.4 eV, and t2g = 0.2 eV. The spectral weight of the lowest absorption feature at 1 – 2 eV changes by a factor of 2 as a function of temperature, which can be attributed to the change of the nearest-neighbor spin-spin correlation function across the Neel temperature TN = 133 K. Interpreting LaSrMnO4 effectively as a Mott-Hubbard insulator naturally explains this strong temperature dependence, the relative weight of the different absorption peaks, and the pronounced… 

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