Layer-resolved magnetic proximity effect in van der Waals heterostructures

Zhong, Ding; Seyler, Kyle L.; Linpeng, Xiayu; Wilson, Nathan P.; Taniguchi, Takashi; Watanabe, Kenji; McGuire, Michael A.; Fu, Kai-Mei C.; Xiao, Di; Yao, Wang; Xu, Xiaodong

doi:10.1038/s41565-019-0629-1

Layer-resolved magnetic proximity effect in van der Waals heterostructures

Journal Article · Mon Jan 27 00:00:00 EST 2020 · Nature Nanotechnology

DOI:https://doi.org/10.1038/s41565-019-0629-1· OSTI ID:1609043

Zhong, Ding ^[1]; Seyler, Kyle L. ^[1]; Linpeng, Xiayu ^[1]; Wilson, Nathan P. ^[1]; Taniguchi, Takashi ^[2]; ^[2]; ^[3]; Fu, Kai-Mei C. ^[1]; Xiao, Di ^[4]; ^[5]; ^[1]

Univ. of Washington, Seattle, WA (United States)
National Inst. for Materials Science, Tsukuba (Japan)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Univ. of Hong Kong (China)

Magnetic proximity effects are integral to manipulating spintronic, superconducting, excitonic and topological phenomena in heterostructures. These effects are highly sensitive to the interfacial electronic properties, such as electron wavefunction overlap and band alignment. The recent emergence of magnetic two-dimensional materials opens new possibilities for exploring proximity effects in van der Waals heterostructures. In particular, atomically thin CrI₃ exhibits layered antiferromagnetism, in which adjacent ferromagnetic monolayers are antiferromagnetically coupled. In this paper, we report a layer-resolved magnetic proximity effect in heterostructures formed by monolayer WSe₂ and bi/trilayer CrI₃. By controlling the individual layer magnetization in CrI₃ with a magnetic field, we show that the spin-dependent charge transfer between WSe₂ and CrI₃ is dominated by the interfacial CrI₃ layer, while the proximity exchange field is highly sensitive to the layered magnetic structure as a whole. In combination with reflective magnetic circular dichroism measurements, these properties allow the use of monolayer WSe₂ as a spatially sensitive magnetic sensor to map out layered antiferromagnetic domain structures at zero magnetic field as well as antiferromagnetic/ferromagnetic domains at finite magnetic fields. Our work reveals a way to control proximity effects and probe interfacial magnetic order via van der Waals engineering.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC05-00OR22725; SC0018171; SC0019443

OSTI ID:: 1609043

Journal Information:: Nature Nanotechnology, Journal Name: Nature Nanotechnology Journal Issue: 3 Vol. 15; ISSN 1748-3387

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Magnetization textures in twisted bilayer 2D CrX$_3$ (X=Br, I) Xiao, Feiping; Chen, Keqiu; Tong, Qingjun arXiv https://doi.org/10.48550/arxiv.2103.10604	text	January 2021

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