Effect of X-ray Irradiation on the Organic Superconductor \kappa-(BEDT-TTF)2Cu(NCS)2 Probed by 13C-NMR
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概要
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\kappa-(BEDT-TTF)2Cu(NCS)2 [BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene] has semiconductive properties at high temperatures, but these properties are suppressed by X-ray irradiation. Utilizing 13C-NMR, we assessed the effects of X-ray irradiation. When we compared the spectrum and spin--spin relaxation times, T_{2}, of irradiated and nonirradiated \kappa-(BEDT-TTF)2Cu(NCS)2, we found that defects caused by irradiation reduced the connection between ethylene motion and conduction electrons. Measurements of Knight shift and (T_{1}T)^{-1} confirmed that irradiation had no effect on carrier density.
- 2012-11-15
著者
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KATO Hiroki
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Matsunaga Noriaki
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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Kawamoto Atsushi
Department of Biology, Faculty of Science, Chiba University
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Nomura Kazushige
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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Kuwata Yuki
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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MATSUMOTO Miko
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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