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arXiv 2206.02429cond-mat.mtrl-sci
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界面杂化法研究单层VSe2的磁性转变

Magnetic Transition in Monolayer VSe2 via Interface Hybridization

Wen Zhang, Lei Zhang, Ping Kwan Johnny Wong, Jiaren Yuan, Giovanni Vinai, Piero Torelli, Gerrit van der Laan, Yuan Ping Feng, Andrew Thye Shen Wee

摘要:

单层VSe_2的磁性在自旋电子学领域引起了广泛的兴趣,但现有的报道还没有达成共识。使用特定元素的X射线磁性圆二色性,在ML VSe 2的磁性转变已被证明在Co和VSe 2之间的无污染界面。通过与Co原子的界面杂化,揭示了ML VSe 2中每个V原子的磁矩约为0.4 μ B,接近以前理论计算预测的值。促进ML VSe 2的铁磁性是伴随着其反铁磁耦合到Co和减少的自旋矩的Co。在比较的情况下,这种界面诱导的铁磁性在Fe/MLMoSe 2接口,这些发现在Co/ML-VSe 2接口提供了明确的证据,ML VSe 2,最初与磁无序,是在磁过渡的边缘。

英文摘要:

Magnetism in monolayer (ML) VSe2 has attracted broad interest in spintronics while existing reports have not reached consensus. Using element-specific X-ray magnetic circular dichroism, a magnetic transition in ML VSe2 has been demonstrated at the contamination-free interface between Co and VSe2. Via interfacial hybridization with Co atomic overlayer, a magnetic moment of about 0.4 uB per V atom in ML VSe2 is revealed, approaching values predicted by previous theoretical calculations. Promotion of the ferromagnetism in ML VSe2 is accompanied by its antiferromagnetic coupling to Co and a reduction in the spin moment of Co. In comparison to the absence of this interface-induced ferromagnetism at the Fe/MLMoSe2 interface, these findings at the Co/ML-VSe2 interface provide clear proof that the ML VSe2, initially with magnetic disorder, is on the verge of magnetic transition.

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