Random singlet physics in the $S=\frac{1}{2}$ pyrochlore antiferromagnet NaCdCu${}_2$F${}_7$

Andrej Kancko, Hironori Sakai, Cinthia Antunes Corrêa +7

We report a random singlet ground state in the $S=\frac{1}{2}$ Heisenberg pyrochlore antiferromagnet NaCdCu${}_2$F${}_7$. Cationic Na${}^{+}$/Cd${}^{2+}$ disorder on the pyrochlore $A$ site…