Effect of orbital symmetry on the anisotropic superexchange interaction

Details Effect of orbital symmetry on the anisotropic superexchange interaction Effect of orbital symmetry on the anisotropic superexchange interaction

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13g3034k&link_type=abstract

New Journal of Physics, Volume 13, Issue 7, pp. 073034 (2011).

Physics

1

Scientific paper

Employing the microscopic superexchange model incorporating the effect of spin-orbit interaction, we have investigated the Dzyaloshinsky-Moriya (DM) interaction in perovskite transition-metal (TM) oxides and explored the interplay between the DM interaction and the TM-3d orbital symmetry. For d3 and d5 systems with isotropic orbital symmetry, the DM vectors are well described by a simple symmetry analysis considering only the bond geometry. In contrast, the DM interaction for d4 systems with anisotropic orbital symmetry shows slightly different behavior, which does not obey simple symmetry analysis. The direction as well as the strength of the DM vector varies depending on the occupied orbital shape. We have understood this behavior based on the orbital symmetry induced by local crystal field variation.

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