Signatures of a gapless quantum spin liquid in the Kitaev material Na${}_3$Co${}_{2-x}$Zn${}_x$SbO${}_6$

Zhongtuo Fu, Ruokai Xu, Yingqi Chen +13

The honeycomb-lattice cobaltate Na${}_3$Co${}_2$SbO${}_6$ has recently been proposed to be a proximate Kitaev quantum spin liquid~(QSL) candidate. However, non-Kitaev terms in the Hamilt…