Designing layered 2D skyrmion lattices in moiré magnetic hetero-structures
arXiv:2302.01074 · doi:10.1002/admi.202300188
Abstract
Skyrmions are promising for the next generation of spintronic and magnonic devices, but their zero-field stability and controlled nucleation through chiral interactions remain challenging. In this theoretical study, we explore the potential of moiré magnetic heterostructures to generate ordered skyrmion lattices from the stacking-dependent magnetism in 2D magnets. We consider heterostructures formed by twisting ultrathin CrBr_3 films on top of CrI_3 substrates, assuming a moderate interfacial Dzyaloshinskii-Moriya interaction. At large moiré periodicity and appropriate substrate thickness, a moiré skyrmion lattice emerges in the interfacial CrBr_3 layer due to the weaker exchange interactions in CrBr_3 compared to CrI_3. This lattice is then projected to the remaining layers of the CrBr_3 film via emergent chiral interlayer fields. By varying the pristine stacking configurations within the ultrathin CrBr_3 film, we realize layered ferromagnetic and antiferromagnetic skyrmion lattices without the need for a permanent magnetic field. Our findings suggest the possibility of creating colorful skyrmion lattices in moiré magnetic heterostructures, enabling further exploration of their fundamental properties and technological relevance.
References in corpus (16)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Spontaneous Skyrmion Ground States in Magnetic Metals
- Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
- Skyrmions in Magnetic Multilayers
- Skyrmions and Anomalous Hall Effect in a Dzyloshinskii-Moriya Spiral Magnet
- Twist engineering of the two-dimensional magnetism in double bilayer chromium triiodide homostructures
- Moiré skyrmions and chiral magnetic phases in twisted CrX (X I, Br, Cl) bilayers
- Properties and dynamics of meron topological spin textures in the two-dimensional magnet CrCl3
- Evidence of Noncollinear Spin Texture in Magnetic Moiré Superlattices
- Magnetization textures in twisted bilayer 2D CrX (X=Br, I)
- Moiré magnons in twisted bilayer magnets with collinear order
- Magnetic skyrmion lattices in a novel two-dimensional twisted bilayer magnet
- Emergence of electric-field-tunable interfacial ferromagnetism in 2D antiferromagnet heterostructures
- Whirling interlayer fields as a source of stable topological order in moiré CrI3
- A hierarchy of multi-moment skyrmion phases in twisted magnetic bilayers
- Tunable Strong Magnetic Anisotropy in Two-Dimensional van der Waals Antiferromagnets