Magnetism, conductivity, and orbital order in (LaMnO3)2n (SrMnO3)n superlattices

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.78.201102· OSTI ID:961774

Dong, Shuai ^[1]; Yu, Rong ^[1]; Yunoki, Seiji ^[2]; Alvarez, Gonzalo ^[1]; Liu, J. -M. ^[3]; Dagotto, Elbio R ^[1]

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1. ORNL
2. RIKEN, Japan
3. Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing

The modulation of charge density and spin order in LaMnO32n / SrMnO3n 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.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 961774
• Journal Information: Physical Review B, Journal Name: Physical Review B Journal Issue: 20 Vol. 78; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CHARGE DENSITY
FERROMAGNETISM
INTERFACES
LANTHANUM OXIDES
LAYERS
MAGNETISM
MANGANESE OXIDES
MODULATION
MONTE CARLO METHOD
ORDER PARAMETERS
SPIN
STRONTIUM OXIDES
SUPERLATTICES