Cluster-based Haldane state in edge-shared tetrahedral spin-cluster chain: Fedotovite K${}_2$Cu${}_3$O(SO${}_4$)${}_3$

M. Fujihala, T. Sugimoto, T. Tohyama +13

Fedotovite K${}_2$Cu${}_3$O(SO${}_4$)${}_3$ is a candidate of new quantum spin systems, in which the edge-shared tetrahedral (EST) spin-clusters consisting of Cu${}^{2+}$ are connected by we…