Van der Waals magnets: Wonder building blocks for two‐dimensional spintronics?

Zhang, Wen; Wong, Ping Kwan Johnny; Zhu, Rui; Wee, Andrew Thye Shen

doi:10.1002/inf2.12048

Cited by 107 publications

(69 citation statements)

References 180 publications

(411 reference statements)

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“…Ferromagnetism in a van der Waals (vdW) crystal down to the monolayer limit is a coveted property that has great potential in novel magnetic device applications. [ 1–3 ] It also offers attractive opportunities of exploring new physical phenomena in two‐dimensions, e.g., long range magnetic ordering in 2D materials controlled by layer thickness [ 4,5 ] and electric field. [ 6,7 ] Recently, truly 2D magnets have been realized experimentally, with ferromagnetisms demonstrated in atomically thin layers of CrI 3 [ 4 ] and Cr 2 Ge 2 Te 6 [ 8 ] in 2017, and Fe 3 GeTe 2 [ 9 ] in 2018.…”

Section: Figurementioning

confidence: 99%

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe₂ Induce Magnetism?

et al. 2020

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There have been several recent conflicting reports on the ferromagnetism of clean monolayer VSe2. Herein, the controllable formation of 1D defect line patterns in vanadium diselenide (VSe2) monolayers initiated by thermal annealing is presented. Using scanning tunneling microscopy and q‐plus atomic force microscopy techniques, the 1D line features are determined to be 8‐member‐ring arrays, formed via a Se deficient reconstruction process. The reconstructed VSe2 monolayer with Se‐deficient line defects displays room‐temperature ferromagnetism under X‐ray magnetic circular dichroism and magnetic force microscopy, consistent with the density functional theory calculations. This study possibly resolves the controversy on whether ferromagnetism is intrinsic in monolayer VSe2, and highlights the importance of controlling and understanding the atomic structures of surface defects in 2D crystals, which could play key roles in the material properties and hence potential device applications.

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Section: Figurementioning

confidence: 99%

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe₂ Induce Magnetism?

et al. 2020

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“…To achieve this goal, several aspects need to be considered. (i) We should make good use of 2D magnetic heterostructures that can be designed freely and constructed artificially [95]. The atomically sharp interfaces of various 15 Research 2DMM-based heterostructures are ideal for the spin injection and tunneling at the junction.…”

Section: Conclusion and Future Perspectivementioning

confidence: 99%

Recent Advances in Two-Dimensional Magnets: Physics and Devices towards Spintronic Applications

et al. 2020

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The emergence of low-dimensional nanomaterials has brought revolutionized development of magnetism, as the size effect can significantly influence the spin arrangement. Since the first demonstration of truly two-dimensional magnetic materials (2DMMs) in 2017, a wide variety of magnetic phases and associated properties have been exhibited in these 2DMMs, which offer a new opportunity to manipulate the spin-based devices efficiently in the future. Herein, we focus on the recent progress of 2DMMs and heterostructures in the aspects of their structural characteristics, physical properties, and spintronic applications. Firstly, the microscopy characterization of the spatial arrangement of spins in 2D lattices is reviewed. Afterwards, the optical probes in the light-matter-spin interactions at the 2D scale are discussed. Then, particularly, we systematically summarize the recent work on the electronic and spintronic devices of 2DMMs. In the section of electronic properties, we raise several exciting phenomena in 2DMMs, i.e., long-distance magnon transport, field-effect transistors, varying magnetoresistance behavior, and (quantum) anomalous Hall effect. In the section of spintronic applications, we highlight spintronic devices based on 2DMMs, e.g., spin valves, spin-orbit torque, spin field-effect transistors, spin tunneling field-effect transistors, and spin-filter magnetic tunnel junctions. At last, we also provide our perspectives on the current challenges and future expectations in this field, which may be a helpful guide for theorists and experimentalists who are exploring the optical, electronic, and spintronic properties of 2DMMs.

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“…Recent discovery of magnetism in the atomically thin twodimensional (2D) van der Waals (vdW) materials has put them into focus of extensive scientific research due to importance of such materials for development of 2D spintronic and nanoelectronic devices as well as study of challenging physical phenomena like exotic quantum phases, topological spin excitations, etc. [1][2][3][4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Spin-induced negative thermal expansion and spin–phonon coupling in van der Waals material CrBr3

et al. 2021

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The two-dimensional van der Waals (vdW) magnets retaining magnetic order in atomically thin limit demonstrate challenging physical phenomena and they are considered as prospective building blocks for construction of advanced spintronics and nanoelectronics devices. Here, we present experimental evidence for negative thermal expansion of lattice volume and vdW layers and strong spin–phonon coupling effects, caused by formation of the long-range ferromagnetic order in the vdW material CrBr3. The neutron and X-ray diffraction measurements revealed anomalous temperature variation of lattice parameters and interatomic distances and angles in the vicinity of Curie temperature (TC). A pronounced rise of the frequencies of the most of the observed vibrational modes and unusual reversal broadening of their full widths at half maximum below TC was found from Raman spectroscopy measurements.

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Van der Waals magnets: Wonder building blocks for two‐dimensional spintronics?

Cited by 107 publications

References 180 publications

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe₂ Induce Magnetism?

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe₂ Induce Magnetism?

Recent Advances in Two-Dimensional Magnets: Physics and Devices towards Spintronic Applications

Spin-induced negative thermal expansion and spin–phonon coupling in van der Waals material CrBr3

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Van der Waals magnets: Wonder building blocks for two‐dimensional spintronics?

Cited by 107 publications

References 180 publications

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe2 Induce Magnetism?

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe2 Induce Magnetism?

Recent Advances in Two-Dimensional Magnets: Physics and Devices towards Spintronic Applications

Spin-induced negative thermal expansion and spin–phonon coupling in van der Waals material CrBr3

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Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe₂ Induce Magnetism?

Can Reconstructed Se‐Deficient Line Defects in Monolayer VSe₂ Induce Magnetism?