Extreme Suppression of Antiferromagnetic Order and Critical Scaling in a Two-Dimensional Random Quantum Magnet

Sr₂CuTeO₆ is a square-lattice Néel antiferromagnet with superexchange between first-neighbor S=1/2 Cu spins mediated by plaquette centered Te ions. Substituting Te by W, the affected impurity plaquettes have predominantly second-neighbor interactions, thus causing local magnetic frustration. Our newly constructed cold neutron triple-axis spectrometer Xingzhi was used to investigate the extremely rapid suppression of the Néel order by the W induced magnetic frustration.

Read more at Physical Review Letters: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.037201