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arXiv · 2206.02429

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
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Abstract

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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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. 2022-06-06. Magnetic Transition in Monolayer VSe2 via Interface Hybridization. https://doi.org/10.1021/acsnano.9b02996

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