Domain Wall Formation and Magnon Localization in Twisted Chromium Trihalides

The rise of twistronics revolutionizes the field of condensed matter physics, and more specifically the future applications of 2D materials. At small twist angles, the microscopic world becomes strongly correlated, and unexpected physical phenomena such as superconductivity emerge. For magnetic layers, stacking plays a crucial role in the magnetic exchange coupling between the layers leading to nontrivial spin configurations and flat spin‐wave dispersion when twisted. Herein, a short overview of the most recent theoretical and experimental works reporting the effect of twist angles on 2D magnets is given. In addition, the effect of the twist angle and the local antiferromagnetic interlayer exchange coupling on the formation of antiferromagnetic domains in chromium trihalides is discussed. Finally, some preliminary results on the effect of the stacking and the twist angle on the spin‐wave dispersion of bilayer CrI 3 are shown.