Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates

Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates
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DOI:
10.1038/s41565-018-0063-9
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发表时间:
2018-04-01
影响因子:
38.3
通讯作者:
Batzill, Matthias
Batzill, Matthias
中科院分区:
材料科学1区
文献类型:
--
作者:
Bonilla, Manuel;Kolekar, Sadhu;Batzill, Matthias

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货车德瓦耳斯材料中的降维和层间耦合导致与体材料相比,单层材料中的电子(1)、光学(2)和多体量子(3-5)性质根本不同。这种层的依赖性允许发现新的材料性能在单层政权。二维材料中的铁磁有序是一种令人垂涎的性质,它将允许对低维自旋行为进行基础研究,并使新的自旋电子学应用成为可能(6-9)。最近的研究表明,对于体铁磁层状材料Cr 1(3)(参考文献(9))和Cr2 Ge 2 Te 6(参考文献(10)),铁磁有序在低温下保持到最低限度。与这些观察结果相反,我们报告了单层VSe 2的强铁磁有序的出现,VSe 2是一种在本体中具有顺磁性的材料(11,12)。重要的是,具有大磁矩的铁磁有序持续到室温以上,使VSe 2成为货车德瓦尔斯自旋电子学应用的有吸引力的材料。
Reduced dimensionality and interlayer coupling in van der Waals materials gives rise to fundamentally different electronic(1), optical(2) and many-body quantum(3-5) properties in monolayers compared with the bulk. This layer-dependence permits the discovery of novel material properties in the monolayer regime. Ferromagnetic order in two-dimensional materials is a coveted property that would allow fundamental studies of spin behaviour in low dimensions and enable new spintronics applications(6-9). Recent studies have shown that for the bulk-ferromagnetic layered materials Crl(3), (ref. (9) ) and Cr2Ge2Te6 (ref. (10)), ferromagnetic order is maintained down to the ultrathin limit at low temperatures. Contrary to these observations, we report the emergence of strong ferromagnetic ordering for monolayer VSe2, a material that is paramagnetic in the bulk(11,12). Importantly, the ferromagnetic ordering with a large magnetic moment persists to above room temperature, making VSe2 an attractive material for van der Waals spintronics applications.