期刊
NANOTECHNOLOGY
卷 29, 期 21, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aab344
关键词
two-dimensional triferroics; diluted magnetic semiconductors; magnetoelectric coupling; first-principles calculations
资金
- National Natural Science Foundation of China [21573084, 11274130]
We report the first-principles evidence of a series of two-dimensional triferroics (ferromagnetic + ferroelectric + ferroelastic), which can be obtained by doping transition-metal ions in group-IV monochalcogenide (SnS, SnSe, GeS, GeSe) monolayers, noting that a ferromagnetic Fe-doped SnS2 monolayer has recently been realized (Li B et al 2017 Nat. Commun. 8 1958). The ferroelectricity, ferroelasticity and ferromagnetism can be coupled and the magnetization direction may be switched upon ferroelectric/ferroelastic switching, rendering electrical writing + magnetic reading possible. They can be also two-dimensional half-metals or diluted magnetic semiconductors, where p/n channels or even multiferroic tunneling junctions can be designed by variation in doping and incorporated into a monolayer wafer.
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