Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder

T. Furukawa, K. Miyagawa, T. Itou, M. Ito, H. Taniguchi, M. Saito, S. Iguchi, T. Sasaki, K. Kanoda

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)


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)2Cu[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.

Original languageEnglish
Article number077001
JournalPhysical Review Letters
Issue number7
Publication statusPublished - 2015 Aug 11


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