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One particularly useful feature of van der Waals materials is the ability to combine layers of different materials into a single heterostructure, which can have superior properties than any of the constituent materials alone. Here, Cheng et al. combine two interlayer-antiferromagnetic chromium trihalides, CrI₃ and CrCl₃ in close proximity, and demonstrate ferromagnetic coupling between them.

Accessing strong correlation effects in Kagome materials remains challenging. Here, the authors realize a Kagome Kondo lattice in CsCr₆Sb₆ exhibiting flat, isolated Kagome bands at the Fermi level.

Angle-resolved photoemission spectroscopy measurements in CoSi reveal the presence of unconventional chiral fermions near the Fermi level, with giant surface Fermi arcs and one pair of well separated chiral nodes.

Twisted 2D magnets provide a rich playground for potential spintronic device architectures. Here, the authors use tunneling magnetoresistance measurements to investigate the collective spin states of twisted double bilayer CrI₃ in various configurations, providing evidence of non-volatile spin textures.

MnBi₂Te₄ and Bi₂Te₃ can form natural superlattices, where the MnBi₂Te₄ layers are separated by multiples of Bi₂Te₃. The combination of these two materials offers a potential platform for the interplay of tunable magnetism and topology. Here, the authors show that MnBi₄Te₇ and MnBi₆Te₁₀ display a complex magnetic ground state with coexisting ferromagnetic and antiferromagnetic domains.

By carefully inducing twists or lattice stacking offsets between two adjacent van der Waals crystals, a superlattice potential can be introduced. This Moire lattice offers an incredibly rich physics, ranging from superconductivity to exotic magnetism, depending on van der Waals materials in question. Here, Du et al. study the magnetic domains in twisted CrI₃, and show that despite this domain structure, spin fluctuations are spatially homogenous.

A moiré potential may play a role in determining the magnetic properties of a two-dimensional homo or heterostructure. Now, non-collinear spin structures are observed in twisted double bilayer CrI₃, providing a platform to engineer unusual magnetic textures.

The interplay between electron correlation and topological properties remains less understood. Here, the authors report a charge density wave (CDW) order on the (001) surface of a Weyl semimetal CoSi, where an energy gap modulates spatially with the CDW wave vector.

Exciton dynamics can be strongly affected by lattice vibrations through electron-phonon (e-ph) coupling. Here, the authors show the presence of strong e-ph coupling in bilayer CrI₃ and observe a Raman feature with periodic broad modes up to the 8th order, attributed to the polaronic character of excitons.

Characteristics of spin waves in recently discovered two-dimensional (2D) Ising ferromagnets are still lacking. Here, Jin and Kim et al. report Raman resonance evidence of two sets of surface spin waves in the 2D honeycomb ferromagnet CrI₃.

Stacking and twisting two-dimensional materials has led to the observation of a variety of electronic phenomena. Now, magnetic behaviour that is distinct from anything seen in individual layers is induced by a moiré pattern in double bilayer chromium triiodide.