2026/06/04 by Ryota Ono, Jun'ichi Ieda, Michiyasu Mori +1 · 1 voice
Physics and Astronomy · #cond-mat.str-el
arxiv published 2026/06/04 · arxiv updated 2026/06/05
Spin supersolids emerge as a central topic in frustrated magnetism, motivating the search for realization in quantum materials. To this end, we study the origin of exchange anisotropy, Δ, in triangular-lattice cobaltate families X2YCo(PO4)2 and X2Co(SeO3)2 (X = Na, K, Rb, Cs; Y = Mg, Ca, Sr, Ba) by tailoring realistic spin models. We show that Δ is determined by the ratio of trigonal crystal field to spin-orbit coupling strength. This framework explains contrasting anisotropies in these families, predicts systematic trends in Δ across X/Y-substitutions, and identifies candidate materials for spin supersolids. Our results establish trigonal field engineering as a microscopic route toward the design of spin supersolids.