Metal-insulator transition in $(LaMnO_3)_{2n}/(SrMnO_3)_n$ superlattices

Details Metal-insulator transition in $(LaMnO_3)_{2n}/(SrMnO_3)_n$ superlattices Metal-insulator transition in $(LaMnO_3)_{2n}/(SrMnO_3)_n$ superlattices

2008-10-08

arxiv.org/abs/0810.1441v2

Physical Review B 78, 201102(R) (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

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. The recently experimentally observed metal-insulator transition with increasing $n$ is reproduced in our studies, and $n=3$ is found to be the critical value.

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