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Title: Ambipolar ferromagnetism by electrostatic doping of a manganite
Authors: Zheng, L. M.
Lü, W. M.
Li, C. J.
Paudel, T. R.
Liu, Z. Q.
Huang, Z.
Zeng, S. W.
Han, Kun
Qiu, X. P.
Li, M. S.
Yang, Shize
Wang, Xiao Renshaw
Chen, Z. H
Yang, B.
Chisholm, Matthew F.
Martin, L. W.
Pennycook, S. J.
Tsymbal, E. Y.
Coey, J. M. D.
Cao, W. W.
Keywords: Manganite
Ambipolar Ferromagnetism
Issue Date: 2018
Source: Zheng, L. M., Wang, X. R., Lü, W. M., Li, C. J., Paudel, T. R., Liu, Z. Q., et al. (2018). Ambipolar ferromagnetism by electrostatic doping of a manganite. Nature Communications, 9(1), 1897-.
Series/Report no.: Nature Communications
Abstract: Complex-oxide materials exhibit physical properties that involve the interplay of charge and spin degrees of freedom. However, an ambipolar oxide that is able to exhibit both electron-doped and hole-doped ferromagnetism in the same material has proved elusive. Here we report ambipolar ferromagnetism in LaMnO3, with electron–hole asymmetry of the ferromagnetic order. Starting from an undoped atomically thin LaMnO3 film, we electrostatically dope the material with electrons or holes according to the polarity of a voltage applied across an ionic liquid gate. Magnetotransport characterization reveals that an increase of either electron-doping or hole-doping induced ferromagnetic order in this antiferromagnetic compound, and leads to an insulator-to-metal transition with colossal magnetoresistance showing electron–hole asymmetry. These findings are supported by density functional theory calculations, showing that strengthening of the inter-plane ferromagnetic exchange interaction is the origin of the ambipolar ferromagnetism. The result raises the prospect of exploiting ambipolar magnetic functionality in strongly correlated electron systems.
DOI: 10.1038/s41467-018-04233-5
Rights: © 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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