Spin liquid close to a quantum critical point in Na${}_4$Ir${}_3$O${}_8$

Yogesh Singh, Y. Tokiwa, J. Dong +1

Na${}_4$Ir${}_3$O${}_8$ is a candidate material for a 3-dimensional quantum spin-liquid on the hyperkagome lattice. We present thermodynamic measurements of heat capacity $C$ and thermal…