Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 140, Issue 30, Pages 9768-9773Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b06475
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Funding
- 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]
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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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