Mermin-Wagner physics, (H,T) phase diagram, and candidate quantum spin-liquid phase in the spin-1/2 triangular-lattice antiferromagnet Ba8CoNb6O24

Y. Cui, J. Dai, P. Zhou +11

Ba${}_8$CoNb${}_6$O${}_{24}$ presents a system whose Co${}^{2+}$ ions have an effective spin 1/2 and construct a regular triangular-lattice antiferromagnet (TLAFM) with a very large interl…