空中骑兵
凝聚态物理
铁电性
自旋电子学
异质结
范德瓦尔斯力
铁磁性
材料科学
极化密度
物理
磁化
磁场
量子力学
分子
电介质
作者
Kai Huang,Ding-Fu Shao,Evgeny Y. Tsymbal
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-04-05
卷期号:22 (8): 3349-3355
被引量:21
标识
DOI:10.1021/acs.nanolett.2c00564
摘要
Magnetic skyrmions are chiral nanoscale spin textures which are usually induced by the Dzyaloshinskii-Moriya interaction (DMI). Recently, magnetic skyrmions have been observed in two-dimensional (2D) van der Waals (vdW) ferromagnetic materials, such as Fe3GeTe2. The electric control of skyrmions is important for their potential application in low-power memory technologies. Here, we predict that DMI and magnetic skyrmions in a Fe3GeTe2 monolayer can be controlled by ferroelectric polarization of an adjacent 2D vdW ferroelectric In2Se3. Based on density functional theory and atomistic spin-dynamics modeling, we find that the interfacial symmetry breaking produces a sizable DMI in a Fe3GeTe2/In2Se3 vdW heterostructure. We show that the magnitude of DMI can be controlled by ferroelectric polarization reversal, leading to creation and annihilation of skyrmions. Furthermore, we find that the sign of DMI in a In2Se3/Fe3GeTe2/In2Se3 heterostructure changes with ferroelectric switching reversing the skyrmion chirality. The predicted electrically controlled skyrmion formation may be interesting for spintronic applications.
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