期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 30, 页码 9768-9773出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b06475
关键词
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资金
- National Natural Science Foundation of China [11674055]
- Fundamental Research Funds for the Central Universities
- Jiangsu Innovation Projects for Graduate Student [KYLX16 0116]
- National Supercomputer Center in Guangzhou (NSCC-GZ)
- Army Research Office [W911NF-16-1-0255]
Achieving multiferroic two-dimensional (2D) materials should enable numerous functionalities in nanoscale devices. Until now, however, predicted 2D multiferroics are very few and with coexisting yet only loosely coupled (type-I) ferroelectricity and magnetism. Here, a type-II multiferroic MXene Hf2VC2F2 monolayer is identified, where ferroelectricity originates directly from its magnetism. The noncollinear 120 degrees Y-type spin order generates a polarization perpendicular to the spin helical plane. Remarkably, the multiferroic transition is estimated to occur above room temperature. Our investigation should open the door to a new branch of 2D materials in the pursuit of intrinsically strong magnetoelectricity.
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