Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 36, Pages 8882-8888Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c02615
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Funding
- National Natural Science Foundation of China [51872170, 12074217]
- Natural Science Foundation of Shandong Province [ZR2019MEM013]
- Shandong Provincial Key Research and Development Program (Major Scientific and Technological Innovation Project) [2019JZZY010302]
- Taishan Scholar Program of Shandong Province
- Young Scholars Program of Shandong University (YSPSDU)
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A stable two-dimensional FeHfSe3 material with strong electromagnetic coupling has been discovered, exhibiting a high Curie temperature and easy switching characteristics. This material can stably coexist ferroelectricity and magnetism under applied strain, with uniaxial tensile strain effectively enhancing the ferroelectricity.
As a consequence of the mutually exclusive origins of ferroelectricity and magnetism, multiferroic materials with electromagnetic coupling are rare. In this work, stable two-dimensional FeHfSe3 with experimental accessibility is however demonstrated to harbor robust electromagnetic coupling. FeHfSe3 illustrates spontaneous in-plane polarization of 1.29 x 10(-10) C/m, and the energy barrier of 116.54 meV ensures easy switching and a high Curie temperature. In addition, semiconducting FeHfSe3 possesses a stable antiferromagnetic ground state with a Neel temperature of approximately 300 K. In the case of applying strain, ferroelectricity and magnetism coexist stably, and uniaxial tensile strain can effectively enhance the ferroelectricity.
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