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Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling

TitleProbing magnetism in 2D van der Waals crystalline insulators via electron tunneling
Publication TypeJournal Article
Year of Publication2018
AuthorsKlein, DR, MacNeill, D, Lado, JL, Soriano, D, Navarro-Moratalla, E, Watanabe, K, Taniguchi, T, Manni, S, Canfield, P, Fernandez-Rossier, J, Jarillo-Herrero, P
JournalScience
Volume360
Pagination1218
Date Published06
Type of ArticleArticle
ISBN Number0036-8075
Accession NumberWOS:000435360400050
Keywordsbilayers, field, hall, intrinsic ferromagnetism, junctions, polarization, spin-orbit torques, Technology - Other Topics, zero
Abstract

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 field-induced metamagnetic transition. Themetamagnetic 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.

DOI10.1126/science.aar3617
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Complex States