Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4768230
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Funding
- National Research Foundation (NRF) Singapore under the Competitive Research Program (CRP) Tailoring Oxide Electronics by Atomic Control [NRF2008NRF-CRP002-024]
- National University of Singapore (NUS)
- FRC (ARF Grant) [R-144-000-278-112]
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The electronic properties of SrRuO3/LaAlO3 (SRO/LAO) superlattices with different interlayer thicknesses of SRO layers were studied. As the thickness of SRO layers is reduced, the superlattices exhibit a metal-insulator transition implying transformation into a more localized state from its original bulk metallic state. The strain effect on the metal-insulator transition was also examined. The origin of the metal-insulator transition in ultrathin SRO film is discussed. All the superlattices, even those with SRO layers as thin as 2 unit cells, are ferromagnetic at low temperatures. Moreover, we demonstrate field effect devices based on such multilayer superlattice structures. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4768230]
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