范德瓦尔斯力
材料科学
单层
自旋电子学
磁性
基质(水族馆)
铁磁性
异质结
悬空债券
凝聚态物理
外延
超晶格
纳米技术
光电子学
化学物理
图层(电子)
硅
化学
物理
海洋学
地质学
有机化学
分子
作者
Bo Li,Zhong Wan,Cong Wang,Peng Chen,Bevin Huang,Xing Cheng,Qi Qian,Jia Li,Zhengwei Zhang,Guangzhuang Sun,Bei Zhao,Hongchao Ma,Ruixia Wu,Zhongming Wei,Yuan Liu,Lei Liao,Yongqin Yu,Yu Huang,Xiaodong Xu,Xidong Duan,Xiangfeng Duan
出处
期刊:Nature Materials
[Springer Nature]
日期:2021-03-01
卷期号:20 (6): 818-825
被引量:205
标识
DOI:10.1038/s41563-021-00927-2
摘要
The discovery of intrinsic ferromagnetism in ultrathin two-dimensional van der Waals crystals opens up exciting prospects for exploring magnetism in the ultimate two-dimensional limit. Here, we show that environmentally stable CrSe2 nanosheets can be readily grown on a dangling-bond-free WSe2 substrate with systematically tunable thickness down to the monolayer limit. These CrSe2/WSe2 heterostructures display high-quality van der Waals interfaces with well-resolved moire superlattices and ferromagnetic behaviour. We find no apparent change in surface roughness or magnetic properties after months of exposure in air. Our calculations suggest that charge transfer from the WSe2 substrate and interlayer coupling within CrSe2 play a critical role in the magnetic order in few-layer CrSe2 nanosheets. The highly controllable growth of environmentally stable CrSe2 nanosheets with tunable thickness defines a robust two-dimensional magnet for fundamental studies and potential applications in magnetoelectronic and spintronic devices.
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