Anisotropic magnetic excitations from single-chirality antiferromagnetic state in Ca-kapellasite

Y. Ihara, K. Arashima, H. Yoshida +2

We present a ${}^{35}$Cl NMR study for spin $S=1/2$ perfect kagome antiferromagnet Ca-kapellasite (CaCu${}_3$(OH)${}_6$Cl${}_2\cdot$0.6H${}_2$O) with a magnetic transition at $T^{\as…