@article{df8bacc89bc14a1da08eac43ec2756df,
title = "Ambipolar ferromagnetism by electrostatic doping of a manganite",
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.",
author = "Zheng, {L. M.} and {Renshaw Wang}, X. and L{\"u}, {W. M.} and Li, {C. J.} and Paudel, {T. R.} and Liu, {Z. Q.} and Z. Huang and Zeng, {S. W.} and Kun Han and Chen, {Z. H.} and Qiu, {X. P.} and Li, {M. S.} and Shize Yang and B. Yang and Chisholm, {Matthew F.} and Martin, {L. W.} and Pennycook, {S. J.} and Tsymbal, {E. Y.} and Coey, {J. M.D.} and Cao, {W. W.}",
note = "Funding Information: L.M.Z., W.M.L., and W.W.C. acknowledges supports from the National Science Foundation of China (No. 51602080 and 51572055), the National Key Basic Research Program of China (No. 2103CB632900) and PIRS of HIT (No. 201625). X.R.W. acknowledges supports from the Nanyang Assistant Professorship grant from Nanyang Technological University and Academic Research Fund Tier 1 (RG108/17S) from Singapore Ministry of Education. C.J.L. acknowledges the financial support from the Lee Kuan Yew Postdoctoral Fellowship through the Singapore Ministry of Education Academic Research Fund Tier 1 (R-284-000-158-114). J.M.D.C. acknowledges supports from China 1000 Foreign Talents Program and from Science Foundation Ireland, Grant 16/IA/4534. Z.H. C. acknowledges support from the National Science Foundation under grant DMR-1608938. L.W.M. acknowledges support from the Gordon and Betty Moore Foundation{\textquoteright}s EPiQS Initiative, under grant GBMF5307. The research at the University of Nebraska-Lincoln is supported by the National Science Foundation through the Nebraska Materials Research Science and Engineering Center (NSF Grant No. DMR-1420645). Z. Q.L. acknowledges support from the National Science Foundation of China (NSFC Grant No. 11704018). The electron microscopy performed at ORNL (S.Z.Y. and M.F.C.) was supported by the U.S. Department of Energy{\textquoteright}s, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. The electron microscopy (S.J.P., M.S.L., and C.J.L.) is supported by the National University of Singapore. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number ACI-1053575 and Grant No DMR160118.",
year = "2018",
month = dec,
day = "1",
doi = "10.1038/s41467-018-04233-5",
language = "English (US)",
volume = "9",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}