Journal ArticleDOI
Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates.
Manuel Bonilla,Sadhu Kolekar,Yujing Ma,Horacio Coy Diaz,Vijaysankar Kalappattil,Raja Das,Tatiana Eggers,Humberto R. Gutierrez,Manh-Huong Phan,Matthias Batzill +9 more
TLDR
Reducing the dimensionality of paramagnetic V Se2 results in the emergence of ferromagnetism that is observed in a monolayer and up to room temperature, making VSe2 an attractive material for van der Waals spintronics applications.Abstract:
Reduced dimensionality and interlayer coupling in van der Waals materials gives rise to fundamentally different electronic
1
, optical
2
and many-body quantum3–5 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 applications6–8. Recent studies have shown that for the bulk-ferromagnetic layered materials CrI3 (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 bulk11,12. 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.read more
Citations
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Journal ArticleDOI
Gate-tunable room-temperature ferromagnetism in two-dimensional Fe 3 GeTe 2 .
Yujun Deng,Yujun Deng,Yijun Yu,Yijun Yu,Yichen Song,Yichen Song,Jingzhao Zhang,Naizhou Wang,Naizhou Wang,Zeyuan Sun,Zeyuan Sun,Yangfan Yi,Yangfan Yi,Yizheng Wu,Yizheng Wu,Shiwei Wu,Shiwei Wu,Junyi Zhu,Jing Wang,Jing Wang,Xianhui Chen,Xianhui Chen,Yuanbo Zhang,Yuanbo Zhang +23 more
TL;DR: It is found that the itinerant ferromagnetism persists in Fe3GeTe2 down to the monolayer with an out-of-plane magnetocrystalline anisotropy, which opens up opportunities for potential voltage-controlled magnetoelectronics based on atomically thin van der Waals crystals.
Journal ArticleDOI
Two-dimensional magnetic crystals and emergent heterostructure devices
TL;DR: Recognizing that magnetic anisotropy can be used to induce stable magnetism in atomic monolayers, Gong and Zhang provide an overview of the materials available and the physical understanding of the effects and then discuss how these effects could be exploited for widespread practical applications.
Journal ArticleDOI
Magnetism in two-dimensional van der Waals materials.
TL;DR: These cleavable materials provide the ideal platform for exploring magnetism in the two-dimensional limit, where new physical phenomena are expected, and represent a substantial shift in the authors' ability to control and investigate nanoscale phases.
Journal Article
Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe 3 GeTe 2
Yujun Deng,Yijun Yu,Yichen Song,Jingzhao Zhang,Naizhou Wang,Zeyuan Sun,Yangfan Yi,Yizheng Wu,Shiwei Wu,Junyi Zhu,Jing Wang,Xianhui Chen,Yuanbo Zhang +12 more
TL;DR: In this paper, it was shown that the itinerant ferromagnetic order persists in Fe3GeTe2 down to the monolayer with an out-of-plane magnetocrystalline anisotropy.
Journal ArticleDOI
Two-dimensional itinerant ferromagnetism in atomically thin Fe3GeTe2.
Zaiyao Fei,Bevin Huang,Paul Malinowski,Wenbo Wang,Tiancheng Song,Joshua Sanchez,Wang Yao,Di Xiao,Xiaoyang Zhu,Andrew F. May,Weida Wu,David Cobden,Jiun-Haw Chu,Xiaodong Xu +13 more
TL;DR: It is demonstrated that Fe3GeTe2 (FGT), an exfoliable vdW magnet, exhibits robust 2D ferromagnetism with strong perpendicular anisotropy when thinned down to a monolayer.
References
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Journal ArticleDOI
Atomically thin MoS2: a new direct-gap semiconductor
TL;DR: The electronic properties of ultrathin crystals of molybdenum disulfide consisting of N=1,2,…,6 S-Mo-S monolayers have been investigated by optical spectroscopy and the effect of quantum confinement on the material's electronic structure is traced.
Journal ArticleDOI
Van der Waals heterostructures
TL;DR: With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.
Journal ArticleDOI
Emerging Photoluminescence in Monolayer MoS2
Andrea Splendiani,Liang Sun,Yuanbo Zhang,Tianshu Li,Jonghwan Kim,Chi-Yung Chim,Giulia Galli,Feng Wang,Feng Wang +8 more
TL;DR: This observation shows that quantum confinement in layered d-electron materials like MoS(2), a prototypical metal dichalcogenide, provides new opportunities for engineering the electronic structure of matter at the nanoscale.
Journal ArticleDOI
Absence of Ferromagnetism or Antiferromagnetism in One- or Two-Dimensional Isotropic Heisenberg Models
N. D. Mermin,Herbert Wagner +1 more
TL;DR: In this paper, it is rigorously proved that at any nonzero temperature, a one- or two-dimensional isotropic spin-S$ Heisenberg model with finite-range exchange interaction can be neither ferromagnetic nor antiferromagnetic.
Journal ArticleDOI
2D materials and van der Waals heterostructures
TL;DR: Two-dimensional heterostructures with extended range of functionalities yields a range of possible applications, and spectrum reconstruction in graphene interacting with hBN allowed several groups to study the Hofstadter butterfly effect and topological currents in such a system.