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Title: Oxygen-driven anisotropic transport in ultra-thin manganite films
Authors: Wang, B.
You, L.
Ren, P.
Yin, X.
Peng, Y.
Xia, B.
Wang, L.
Yu, X. 
Mui Poh, S.
Yang, P. 
Yuan, G.
Chen, L.
Rusydi, A. 
Wang, J.
Issue Date: 2013
Source: Wang, B., You, L., Ren, P., Yin, X., Peng, Y., Xia, B., Wang, L., Yu, X., Mui Poh, S., Yang, P., Yuan, G., Chen, L., Rusydi, A., Wang, J. (2013). Oxygen-driven anisotropic transport in ultra-thin manganite films. Nature Communications 4 : -. ScholarBank@NUS Repository.
Abstract: Transition metal oxides have a range of unique properties due to coupling of charge, spin, orbital and lattice degrees of freedom and nearly degenerate multiple ground states. These properties make them interesting for applications and for fundamental investigations. Here we report a new phase with abnormal transport anisotropy in La 0.7 Sr 0.3 MnO 3 ultra-thin films under large tensile strain. This anisotropy is absent in films under smaller tensile strain or compressive strain. Furthermore, thickness and magnetic-field-dependent experiments suggest that the tensile-strain-induced two-dimensional character is crucial for the observed phenomena. X-ray absorption spectroscopy results indicate that this anisotropy is likely driven by O 2p orbital, which hybridizes with Mn 3d. Ab initio calculations confirm this result. Our results may help to understand the anisotropic transport behaviour observed in other systems. © 2013 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/ncomms3778
Appears in Collections:Staff Publications

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