Ferromagnetism and helical luminescence in a 2D crystal (Conference Presentation)

Efrén Navarro Moratalla; Bevin Huang; Genevieve Clark; Dahlia R. Klein; Ran Cheng; Kyle L. Seyler; Ding Zhong; Emma Schmidgall; Michael A. McGuire; David H. Cobden; Wang Yao; Di Xiao; Pablo Jarillo-Herrero; Xiaodong Xu

doi:10.1117/12.2322611

18 September 2018 Ferromagnetism and helical luminescence in a 2D crystal (Conference Presentation)

Efrén Navarro Moratalla, Bevin Huang, Genevieve Clark, Dahlia R. Klein, Ran Cheng, Kyle L. Seyler, Ding Zhong, Emma Schmidgall, Michael A. McGuire, David H. Cobden, Wang Yao, Di Xiao, Pablo Jarillo-Herrero, Xiaodong Xu

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Proceedings Volume 10732, Spintronics XI; 1073220 (2018) https://doi.org/10.1117/12.2322611
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Magnetism in two-dimensional (2D) materials has been traditionally limited to the study of extrinsic effects such as the introduction of local magnetic moments in non-magnetic 2D crystals via doping or defect engineering.1 The realization of long-range magnetic order in a 2D material has therefore been a tantalizing concept given the high stakes of the incorporation of magnetism in heterostructures for applications such as spintronics or topological superconductivity. Although the vast majority of van der Waals materials are intrinsically diamagnetic, the family of the transition metal trihalides is an exception. In this talk I will present our recent discovery of the first 2D magnet made out of a single layer of a ferromagnetic insulator: chromium triiodide (CrI3).2 Our experiments also showcase the dramatic layer dependence of the magnetic phase transitions in atomically-thin van der Waals crystals down to the monolayer and the intriguing metamagnetism emerging in bilayer CrI3. I will conclude by outlining the potential of this new class of 2D magnets for optoelectronic applications in view of the combination of magnetic hysteresis with helical luminescence in the monolayer limit.3 [1] O. V. Yazyev, Rep. Prog. Phys. 73 (5), 056501 (2010) [2] B. Huang et al. Nature 117, 610 (2017) [3] K. L. Seyler et al. Nat. Phys. (2017)

Conference Presentation

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Efrén Navarro Moratalla, Bevin Huang, Genevieve Clark, Dahlia R. Klein, Ran Cheng, Kyle L. Seyler, Ding Zhong, Emma Schmidgall, Michael A. McGuire, David H. Cobden, Wang Yao, Di Xiao, Pablo Jarillo-Herrero, and Xiaodong Xu "Ferromagnetism and helical luminescence in a 2D crystal (Conference Presentation)", Proc. SPIE 10732, Spintronics XI, 1073220 (18 September 2018); https://doi.org/10.1117/12.2322611

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KEYWORDS

Crystals

Magnetism

Luminescence

Crystallography

Doping

Ferromagnetics

Heterojunctions

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