Microscopic Phase Separation in Triangular-Lattice Quantum Spin Magnet \kappa-(BEDT-TTF)2Cu2(CN)3 Probed by Muon Spin Relaxation
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概要
- 論文の詳細を見る
The ground state of the quantum spin system \kappa-(BEDT-TTF)2Cu2(CN)3, in which antiferromagnetically interacting S=1/2 spins are located on a nearly equilateral triangular lattice, attracts considerable interest from both experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited owing to geometrical frustration, and hence, an exotic ground state is expected. Furthermore, two recent reports on the ground state of this system have increased the intrigue by showing completely controversial results: one indicates the gapless state and the other the gapped state. By utilizing the \muSR microscopic probe, we have investigated its spin dynamics below 0.1 K, unveiling its microscopically phase-separated ground state at zero field.
- 2012-06-15
著者
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Sasaki Takahiko
Institute For Materials Research Tohoku University
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Suzuki Takao
Advanced Meson Science Laboratory Nishina Center Riken
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Yoneyama Naoki
Institute For Materials Research Tohoku University
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Ohishi Kazuki
Advanced Science Research Center Japan Atomic Energy Agency
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Watanabe Isao
Advanced Meson Science Laboratory Nishina Center Riken
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Ishii Yasuyuki
Advanced Meson Science Laboratory Riken Nishina Center
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Kobayashi Norio
Institute For Materials Recearch Tohoku University
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Goto Takayuki
Physics Division, Faculty of Science and Technology, Sophia University, Chiyoda, Tokyo 102-8554, Japan
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NAKAJIMA Saori
Physics Division, Faculty of Science and Technology, Sophia University, Chiyoda, Tokyo 102-8554, Japan
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Oosawa Akira
Physics Division, Faculty of Science and Technology, Sophia University, Chiyoda, Tokyo 102-8554, Japan
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Pratt Francis
ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, United Kingdom
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Ohishi Kazuki
Advanced Meson Science Laboratory, Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
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Ohishi Kazuki
Advanced Meson Science Laboratory, RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
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Suzuki Takao
Advanced Meson Science Laboratory, RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
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Yoneyama Naoki
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Sasaki Takahiko
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Sasaki Takahiko
Institute for Materials Reseach, Tohoku University, 2-1-1 Katahira-cho, Aoba-ku, Sendai 980-8577, Japan
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Watanabe Isao
Advanced Meson Science Laboratory, RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
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Ishii Yasuyuki
Advanced Meson Science Laboratory, RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
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