Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling
Author(s)Klein, Dahlia Rivka; MacNeill, David; Lado, J. L.; Soriano, D.; Navarro-Moratalla, E.; Watanabe, K.; Taniguchi, T.; Manni, S.; Canfield, P.; Fernandez-Rossier, J.; Jarillo-Herrero, Pablo; ... Show more Show less
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Magnetic insulators are a key resource for next-generation spintronic and topological devices. The family of layered metal halides promises varied magnetic states, including ultrathin insulating multiferroics, spin liquids, and ferromagnets, but device-oriented characterization methods are needed to unlock their potential. Here, we report tunneling through the layered magnetic insulator CrI₃ as a function of temperature and applied magnetic field.We electrically detect the magnetic ground state and interlayer coupling and observe a fieldinducedmetamagnetic transition.The metamagnetic transition results in magnetoresistances of 95, 300, and 550% for bilayer, trilayer, and tetralayer CrI₃ barriers, respectively.We further measure inelastic tunneling spectra for our junctions, unveiling a rich spectrum consistent with collective magnetic excitations (magnons) in CrI₃.
DepartmentMassachusetts Institute of Technology. Department of Physics
American Association for the Advancement of Science (AAAS)
Klein, D. R. et al. “Probing Magnetism in 2D van Der Waals Crystalline Insulators via Electron Tunneling.” Science 360, 6394 (May 2018): 1218–1222 © 2018 American Association for the Advancement of Science
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