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Moir\'e skyrmions and chiral magnetic phases in twisted CrX$_{3}$ (X $=$ I, Br, Cl) bilayers by Akram, Muhammad; LaBollita, Harrison; Dey, Dibyendu; Kapeghian, Jesse; Erten, Onur; Botana, Antia S. is a scholarly article available to read on EtoBox.

What is Moir\'e skyrmions and chiral magnetic phases in twisted CrX$_{3}$ (X $=$ I, Br, Cl) bilayers about?

We present a comprehensive theory of the magnetic phases in twisted bilayer Cr-trihalides through a combination of first-principles calculations and atomistic simulations. We show that the stacking-dependent interlayer exchange leads to an effective moir\'e field that is mostly ferromagnetic with antiferromagnetic patches. A wide range of noncollinear magnetic phases can be stabilized as a function of the twist angle and Dzyaloshinskii-Moriya interaction as a result of the competing interlayer antiferromagnetic coupling and the energy cost for forming domain walls. In particular, we demonstrate that for small twist angles various skyrmion crystal phases can be stabilized in both CrI$_3$ and CrBr$_3$. Our results provide an interpretation for the recent observation of noncollinear magnetic phases in twisted bilayer CrI$_3$ and demonstrate the possibility of engineering further nontrivial magnetic ground states in twisted bilayer Cr-trihalides.

Author

Akram, Muhammad; LaBollita, Harrison; Dey, Dibyendu; Kapeghian, Jesse; Erten, Onur; Botana, Antia S.

Published

2021

Language

EN