Articolo in rivista, 2019, ENG, 10.1021/acsnano.9b02996

Magnetic Transition in Monolayer VSe2 via Interface Hybridization

Zhang, Wen; Zhang, Lei; Wong, Ping Kwan Johnny; Yuan, Jiaren; Vinai, Giovanni; Torelli, Piero; van der Laan, Gerrit; Feng, Yuan Ping; Wee, Andrew T. S.

Natl Univ Singapore; Natl Univ Singapore; Natl Univ Singapore; CNR; Diamond Light Source

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. Through interfacial hybridization with a Co atomic overlayer, a magnetic moment of about 0.4 NB 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/ML MoSe2 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.

ACS nano 13 (8), pp. 8997–9004

Keywords

two-dimensional materials, monolayer transition-metal dichalcogenide, VSe2 magnetism, interfacial hybridization, antiferromagnetic coupling

CNR authors

Vinai Giovanni Maria, Torelli Piero

CNR institutes

IOM – Istituto officina dei materiali