J. Richter et al., INDICATIONS FOR THE BREAKDOWN OF LONG-RANGE ORDER IN THE J(1)-J(2) QUANTUM ANTIFERROMAGNET ON SQUARE LATTICE, Journal of magnetism and magnetic materials, 140, 1995, pp. 1609-1610
We discuss the role of quantum fluctuations in the square-lattice anti
ferromagnet. We present several arguments that strong frustration dest
abilizes antiferromagnetic long-range order.