Spin-orbit correlations and exchange-bias control in twisted Janus dichalcogenide multilayers

Abstract

Janus dichalcogenide multilayers provide a paradigmatic platform to engineer electronic phenomena dominated by spin-orbit coupling. Their unique spin-orbit effects stem from local mirror symmetry breaking in each layer, which induces a colossal Rashba spin-orbit effect in comparison with the conventional dichalcogenide counterparts. Here we put forward twisted dichalcogenide bilayers as a simple platform to realize spin-orbit correlated states. We demonstrate the emergence of flat bands featuring strong spin-momentum locking and the emergence of non-collinear symmetry broken states when interactions are included. We further show that the symmetry broken states can be controlled by means of a magnetic substrate, strongly impacting the non-collinear magnetic texture of the moire unit cell. Our results put forward twisted Janus multilayers as a powerful platform to explore spin-orbit correlated physics, and highlighting the versatility of magnetic substrates to control unconventional moire magnetism.

9 pages, 6 figures

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Cited by in corpus (6)

• Twistronics of Janus transition metal dichalcogenide bilayers
• Chiral valley phonons and flat phonon bands in moiré materials
• Chirality-induced spin texture switching in twisted bilayer graphene
• Topological multiferroic order in twisted transition metal dichalcogenide bilayers
• Activating magnetoelectric optical properties by twisting antiferromagnetic bilayers
• Moiré Topology in Twisted Structures with Noncollinear Spin-Orbit Coupling