半掺杂锰氧化物的轨道序

Orbital Orders in the Half-doped Manganites

基于两个轨道的双交换模型,加上超交换相互作用和格点库仑相互作用,利用Hartree-Fock平均场近似,得到半掺杂锰氧化物F相、A相、CE相和C相的轨道序。计算结果表明不同相有不同的轨道序,从而得出不同相呈现不同的电荷序。

Based on the two-orbital double-exchange model plus the superexchange interaction and Coulomb interaction, the orbital orders in the F , A, CE and C phases of the half-doped manganese system are calculated by using the Hartree-Fock mean field method. The results we obtain show that the orbital order is different with phases, causing different charge orders among these phases.