title: Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder.
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.
authors: Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
authors: T
authors: T
authors: Furukawa
authors: Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
authors: K
authors: K
authors: Miyagawa
authors: Department of Applied Physics, Tokyo University of Science, Tokyo 125-8585, Japan.
authors: T
authors: T
authors: Itou
authors: Department of Physics, Saitama University, Saitama 338-8570, Japan.
authors: M
authors: M
authors: Ito
authors: Department of Physics, Saitama University, Saitama 338-8570, Japan.
authors: H
authors: H
authors: Taniguchi
authors: Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors: M
authors: M
authors: Saito
authors: Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors: S
authors: S
authors: Iguchi
authors: Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors: T
authors: T
authors: Sasaki
authors: Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
authors: K
authors: K
authors: Kanoda