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Published on: March 24, 2019
Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder
T Furukawa1, K Miyagawa1, T Itou2
1Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
Abstract:
Quantum spin liquids, which are spin versions of quantum matter, have been sought after in systems with geometrical frustration. We show that disorder drives a classical magnet into a quantum spin liquid through conducting NMR experiments on an organic Mott insulator, κ-(ET)_{2}Cu[N(CN)_{2}]Cl. Antiferromagnetic ordering in the pristine crystal, when irradiated by x rays, disappears. Spin freezing, spin gap, and critical slowing down are not observed, but gapless spin excitations emerge, suggesting a novel role of disorder that brings forth a quantum spin liquid from a classical ordered state.
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