Field-induced CDW in HMTSF-TCNQ |
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Authors: | Keizo Murata Woun Kang Kosuke Masuda Tetsuji Kuse Takahiko Sasaki Keiichi Yokogawa Harukazu Yoshino James S Brooks Eun Sang Choi Andhika Kiswandhi Reizo Kato |
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Institution: | 1. Graduate School of Science, Osaka City Univ, Sumiyoshi-ku, Osaka 558-8585, Japan;2. Department of Physics, Ewha Womans University, Seoul 120-750, South Korea;3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;4. Nat. High Mag. Field Lab. Florida St. University, Tallahassee, FL 32306-4005, USA;5. RIKEN, Wako, Saitama 351-0198, Japan |
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Abstract: | Field-induced successive transitions were observed in magnetoresistance in the quasi-one-dimensional organic conductor, HMTSF-TCNQ, hexamethylene-tetraselena-fulvalene-tetracyanoquinodimethane. The magnetoresistance exhibits kink transitions accompanying hysteresis at pressures around 1 GPa, but neither at p=0 nor at 2 GPa. At p=0 and below 30 K, this material undergoes charge density wave (CDW) state, which is suppressed around 1 GPa, where successive transitions are observed. Since these behavior is only observed at the boundary in pressure between insulator and metal, and the nature of the insulating state is CDW at p=0, it is strongly suggested that the successive transitions observed in magnetoresistance might be associated with CDW, accordingly a field-induced CDW by the one-dimensionalization by strong magnetic field ranging from 10 to 30 T. The behaviors are compared with previously claimed FICDW and the established FISDW (field-induced-spin-density-wave). |
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Keywords: | E d charge density wave Quasi-1D Organic conductor HMTSF-TCNQ |
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