MXenes公司
空中骑兵
自旋电子学
凝聚态物理
磁性
材料科学
范德瓦尔斯力
物理
铁磁性
纳米技术
量子力学
分子
作者
Liming Wang,Yonglong Ga,Peng Li,Dongxing Yu,Junxiang Jiang,Jinghua Liang,Shouguo Wang,Hongxin Yang
出处
期刊:Physical review
日期:2023-08-29
卷期号:108 (5)
被引量:1
标识
DOI:10.1103/physrevb.108.054440
摘要
Two-dimensional (2D) transition metal carbides and nitrides (MXene) host a plethora of interests, e.g., energy storage and conversions, and intriguing quantum phenomena ranging from electronic topological properties to superconductivity. However, topological magnetism is still a missing piece in MXenes. Here, via first-principles calculations, we validate the existence of significant Dzyaloshinskii--Moriya interaction (DMI) in 2D multiferroic MXenes, where the magnitude of DMI scales with the strength of electric dipole of the MXenes. Moreover, using atomistic spin model simulations, we demonstrate that room-temperature (RT) magnetic skyrmions can be spontaneously stabilized at monolayer ${\mathrm{Co}}_{2}\mathrm{C}{\mathrm{F}}_{2}$. The chirality of DMI can be tuned via ferroelectricity effect and, consequently, the skyrmions. We further show that a proper van der Waals substrate can effectively enhance the magnetic anisotropy of ${\mathrm{Co}}_{2}\mathrm{C}{\mathrm{F}}_{2}$ through interlayer charge transfer, while the tunable DMI and RT skyrmions can also be maintained. These results prove that MXenes and their heterostructure can be promising candidates in fabricating ultrathin skyrmionic devices and pave the way for the RT electrically controllable skyrmions toward spintronic applications.
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