Onur Erten, ASU, Wed, April 6, 2022, 1:25pm – 2:25pm
Two-dimensional van der Waals materials can be arranged in different stacking patterns or can be twisted to form moir´e superlattices. These can drastically alter their properties and lead to new emergent phenomena. In this talk, I will focus on moir´e superlattices of van der Waals magnets and discuss how new phases can be created by utilizing twisting. In the first part, I will consider chiral magnets and show that stacking dependent interlayer exchange can be used to create skyrmions (1). I will further illustrate this mechanism by applying itto bilayers of Cr-based trihalides (2). In the second part of my talk, I will focus on SU(2) invariant Kitaev spin-orbital bilayers. I will discuss how interlayer exchange can lead to a gapped quantum spin liquid and the stability of this phase under small twist angles (3).(1) M. Akram, O. Erten Phys. Rev. B 103, L140406 (2021).(2) M. Akram, H. LaBollita, D. Dey, J. Kapeghian, O. Erten, and A. Botana Nano Lett. 15, 6633 (2021).(3) E. Nica, M. Akram. A. Vijayvargia, R. Moessner, O. Erten arXiv:2203.03650(2022).