论文类型：期刊论文
第一作者：Junyi He
通讯作者：Gang Xu
合写作者：Qing Xie
发表刊物：New Journal of Physics
收录刊物：SCI
学科门类：理学
一级学科：物理学
文献类型：J
卷号：23
期号：2
页面范围：23027
发表时间：2021-02-18
影响因子：3.716
摘要：Monolayer 1T-VSe2 has been reported as a room-temperature ferromagnet. In this work, by using the first-principles calculations, we unveil that the ferromagnetism in monolayer 1T-VSe2 is originated from its intrinsic huge Stoner instability enhanced by the confinement effect, which can eliminate the interlayer coupling, and lead to a drastic increase of the density of states at the Fermi level due to the presence of Van Hove singularity. Our calculations also demonstrate that the Stoner instability is very sensitive to the interlayer distance. These results provide a useful route to modulate the nonmagnetic to ferromagnetic transition in few-layers or bulk 1T-VSe2, which also shed light on the enhancement of its Curie temperature by enlarging the interlayer distance.