Electronic structure of A-type antiferomagnetic LaMnO3 by GW approximation
Y. Nohara, A. Yamasaki, S. Kobayashi, T. Fujiwara
Abstract
The electronic structure of the A-type antiferromagnetic insulator LaMnO3 is investigated by the GW approximation. The band gap and spectrum are in a good agreement with experimental observation. The on-site/off-site dynamical screened Coulomb interaction on Mn sites is also calculated. Comparison with the results by the Hartree-Fock and the static COHSEX approximations is discussed in detail. The dynamical screening effect is important for the band gap and widths.
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