Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr${}_2$O${}_4$

K. Tomiyasu, H. Ueda, M. Matsuda +3

A hexamer-type spin excitation seen in spinel chromates $A$Cr${}_2$O${}_4$ ($A$ = Mg, Zn, or Cd) is the representative spin-liquid-like state caused by geometrical frustration. To clar…