A Realistic Model Calculation on Manganite Superlattice

We present a realistic model calculation for (0,0,1) (LaMnO$_3$)$_m$ (SrMnO$_3$)$_n$ superlattices. In this model, the superlattice is defined by the long-range Coulomb interaction generated by different ion charges of La (3+) and Sr (2+). The electronic degree of freedom contains two Manganese-Oxygen hybridized e$_g$ bands coupled to localized Mn $t_{2g}$ spins and to Jahn-Teller phonon modes, and the most general on-site electron-electron interactions within those $e_g$ bands. We will show how charge reconstruction, structural constraints and the symmetry breaking induced by the superlattice affect the orbital and magnetic orders. This work is supported by DMR-0213574.