Wide field imaging of van der Waals ferromagnet Fe3GeTe2 by spin defects in hexagonal boron nitride

Mengqi Huang, Jingcheng Zhou, Di Chen, Hanyi Lu, Nathan J. McLaughlin, Senlei Li, Mohammed Alghamdi, Dziga Djugba, Jing Shi, Hailong Wang and Chunhui Rita Du ()
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Mengqi Huang: University of California, San Diego
Jingcheng Zhou: University of California, San Diego
Di Chen: University of Houston
Hanyi Lu: University of California, San Diego
Nathan J. McLaughlin: University of California, San Diego
Senlei Li: University of California, San Diego
Mohammed Alghamdi: University of California
Dziga Djugba: University of California, San Diego
Jing Shi: University of California
Hailong Wang: University of California, San Diego
Chunhui Rita Du: University of California, San Diego

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Emergent color centers with accessible spins hosted by van der Waals materials have attracted substantial interest in recent years due to their significant potential for implementing transformative quantum sensing technologies. Hexagonal boron nitride (hBN) is naturally relevant in this context due to its remarkable ease of integration into devices consisting of low-dimensional materials. Taking advantage of boron vacancy spin defects in hBN, we report nanoscale quantum imaging of low-dimensional ferromagnetism sustained in Fe3GeTe2/hBN van der Waals heterostructures. Exploiting spin relaxometry methods, we have further observed spatially varying magnetic fluctuations in the exfoliated Fe3GeTe2 flake, whose magnitude reaches a peak value around the Curie temperature. Our results demonstrate the capability of spin defects in hBN of investigating local magnetic properties of layered materials in an accessible and precise way, which can be extended readily to a broad range of miniaturized van der Waals heterostructure systems.

Date: 2022
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DOI: 10.1038/s41467-022-33016-2

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