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

机译:VSE2 Monolayers的强室温铁磁性van der Waals基板

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摘要

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.
机译:与块状相比,van der WALS材料中的减少的维度和层间耦合导致从根本上产生从根本上不同的电子(1),光学(2)和单层的多体量子(3-5)性质。该层依赖性允许在单层制度中发现新的材料特性。二维材料中的铁磁顺序是一种令人垂涎的属性,可以允许低维度的旋转行为的基本研究,并实现新的闪奖应用程序(6-9)。最近的研究表明,对于散装 - 铁磁层状材料CRL(3),(参考文献(9))和CR2GE2Te6(参考文献(10)),将铁磁顺序保持在低温下的超薄极限。与这些观察结果相反,我们报告了对单层VSE2的强力铁磁排序的出现,这是散装中浮雕的材料(11,12)。重要的是,具有大磁矩的铁磁排序持续到高于室温,使VSE 2成为VAN DER WALS的有吸引力的材料。

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