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Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit
Since the discovery of graphene, the family of two-dimensional materials has grown, displaying a broad range of electronic properties. Recent additions include semiconductors with spin–valley
Ferromagnetism Near Room Temperature in the Cleavable van der Waals Crystal Fe5GeTe2.
This work establishes intrinsic magnetic order at room temperature in bulk crystals through magnetization measurements and in exfoliated, thin flakes using the anomalous Hall effect and reveals Fe5GeTe2 as a prime candidate for incorporating intrinsic magnetism into functional van der Waals heterostructures and devices near room temperature.
Giant tunneling magnetoresistance in spin-filter van der Waals heterostructures
The possibility to push magnetic information storage to the atomically thin limit and CrI3 as a superlative magnetic tunnel barrier for vdW heterostructure spintronic devices is revealed.
Two-dimensional itinerant ferromagnetism in atomically thin Fe3GeTe2
It is demonstrated that Fe3GeTe2 (FGT), an exfoliable vdW magnet, exhibits robust 2D ferromagnetism with strong perpendicular anisotropy when thinned down to a monolayer.
Ligand-field helical luminescence in a 2D ferromagnetic insulator
Bulk chromium tri-iodide (CrI3) has long been known as a layered van der Waals ferromagnet1. However, its monolayer form was only recently isolated and confirmed to be a truly two-dimensional (2D)
Electrical control of 2D magnetism in bilayer CrI3
Electrical control of magnetism in a bilayer of CrI3 enables the realization of an electrically driven magnetic phase transition and the observation of the magneto-optical Kerr effect in 2D magnets.
Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics
The photoluminescence detection of valley pseudospin provides a simple and sensitive method to probe the intriguing domain dynamics in the ultrathin magnet, as well as the rich spin interactions within the heterostructure.
Giant nonreciprocal second-harmonic generation from antiferromagnetic bilayer CrI3
Large second-harmonic generation is observed in antiferromagnetic bilayers of CrI3, providing information about the microscopic origin of layered antiferROMagnetism and motivating the use of two-dimensional magnets in nonlinear optical devices.
Van der Waals epitaxial growth of air-stable CrSe2 nanosheets with thickness-tunable magnetic order
It is shown that environmentally stable CrSe2 nanosheets can be readily grown on a dangling-bond-free WSe2 substrate with systematically tunable thickness down to the monolayer limit, which defines a robust two-dimensional magnet for fundamental studies and potential applications in magnetoelectronic and spintronic devices.
Nematic Fluctuations in an Orbital Selective Superconductor Fe$_{1+y}$Te$_{1-x}$Se$_{x}$
We present a systematic study of the nematic fluctuations in the iron chalcogenide superconductor Fe$_{1+y}$Te$_{1-x}$Se$_{x}$ ($0 \leq x \leq 0.53$) using the elastoresistivity technique. Near $x =