Direct observation of van der Waals stacking–dependent interlayer magnetism

Author:

Chen Weijong1ORCID,Sun Zeyuan1ORCID,Wang Zhongjie1ORCID,Gu Lehua1ORCID,Xu Xiaodong2ORCID,Wu Shiwei13ORCID,Gao Chunlei13ORCID

Affiliation:

1. State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (MOE), Department of Physics, and Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China.

2. Department of Physics and Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA.

3. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China.

Abstract

Stacking control Recent searches for two-dimensional magnets have turned up a number of related van der Waals materials, such as chromium triiodide (CrI 3 ) and chromium tribromide (CrBr 3 ). Although their properties are expected to be similar, in bilayer form, the former is antiferromagnetic, whereas the latter appears to be a ferromagnet. Chen et al. used spin-polarized scanning tunneling microscopy to determine that the nature of the magnetic state in bilayer CrBr 3 depends on the type of stacking of its monolayers. An antiferromagnetic state formed when the two monolayers were oriented in the same direction, whereas the opposite orientation led to ferromagnetism. Science , this issue p. 983

Funder

National Natural Science Foundation of China

National Basic Research Program of China

National Key Research and Development Program of China

Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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