Magnetism, conductivity, and orbital order in (LaMnO(3))(2n)/(SrMnO(3))(n) superlattices

作者：Dong Shuai^*; Yu Rong; Yunoki Seiji; Alvarez Gonzalo; Liu J M; Dagotto Elbio

来源：Physical Review B, 2008, 78(20): 201102.

DOI：10.1103/PhysRevB.78.201102

The modulation of charge density and spin order in (LaMnO(3))(2n)/(SrMnO(3))(n) (n=1-4) superlattices is studied via Monte Carlo simulations of the double-exchange model. G-type antiferromagnetic barriers in the SrMnO(3) regions with low charge density are found to separate ferromagnetic LaMnO(3) layers with high charge density. A metal-insulator transition with increasing n is observed in the direction perpendicular to the interfaces. Our simulations provide insight into how disorder-induced localization may cause the metal-insulator transition occurring at n=3 in experiments.

• 出版日期2008-11
• 单位RIKEN; 南京大学