Non-Collinear Antiferromagnetism in Intercalation Compounds of Transition Metal Dichalcogenides

Intense interest in non-collinear antiferromagnets and altermagnets has arisen because these materials share notable electronic transport characteristics with ferromagnets that offer advantages for electrical read-out compared to collinear antiferromagnets, yet still possess the compensated moments that are desirable for ultra-compact, miniaturized devices. The intercalation of first-row transition metals into group V transition metal dichalcogenides (T_xMCh₂, T = first-row transition metal, M = Nb or Ta, Ch = S, Se) leads to a diverse family of metallic materials exhibiting a wide range of magnetic phases, and that have shown a distinctive capacity for ultra-low power switching of magnetism using electrical currents, among other desirable characteristics. Changes in composition alter the extent of orbital angular momentum (which leads to magnetocrystalline anisotropy), electron doping of the TMD host lattice, and magnetic exchange. Accordingly, a wide range of magnetic phases can be tuned by varying the host lattice, identity of the intercalant, along with its stoichiometry and spatial order. This talk will discuss recent work to understand the synthesis, structure, and magnetoelectronic properties of intercalated TMDs with non-collinear or altermagnetic ground states.