Journal
PHYSICAL REVIEW B
Volume 78, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.201102
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Funding
- NSF [DMR-0706020, 50832002]
- Division of Materials Science and Engineering
- U.S. DOE
- CREST-JST
- CNMS
- Scientific User Facilities Division
- BES-DOE
- 973 Projects of China [2006CB921802]
- China Scholarship Council
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The modulation of charge density and spin order in (LaMnO3)(2n)/(SrMnO3)(n) (n=1-4) superlattices is studied via Monte Carlo simulations of the double-exchange model. G-type antiferromagnetic barriers in the SrMnO3 regions with low charge density are found to separate ferromagnetic LaMnO3 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.
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