Neutral-Ionic Phase Transition in DMTTF-QCl_4 Investigated by ^<35>Cl NQR(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We report a ^<35>Cl NQR investigation into the neutral-ionic (NI) phase transition in DMTTF-QCl_4(4,4'-dimethyltetrathiafulvalene-p-chloranil), the end material of the family containing an NI quantum transition system. Four distinct lines with comparable intensities were observed well below T_c=65K; this observation is consistent with the antiferroelectric nature of the ionic phase. The temperature dependences of the spectral shift and splitting below T_c are moderate in contrast with the case of TTF-QCl_4. Low-energy charge-lattice fluctuations are observed around T_c as a drastic increase of 1/T_1, allowing the observation of the quantum fluctuations in a chemically substituted complex. An analysis of the NQR spectra yields detailed temperature variations in the charge transfer and the concomitant lattice distortion around the NI transition.
- 社団法人日本物理学会の論文
- 2007-07-15
著者
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TOKURA Yoshinori
Department of Applied Physics, University of Tokyo
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Fujiyama Shigeki
Department Of Applied Physics University Of Tokyo:crest Japan Science And Technology Agency (jst)
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Tokura Yoshinori
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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HORIUCHI Sachio
Correlated Electron Research Center (CERC), National Institute of Advanced Industrial Science and Te
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Miyagawa Kazuya
Department Of Toxicology Hoshi University School Of Pharmacy And Pharmaceutical Sciences
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Miyagawa Kazuya
Department Of Applied Physics University Of Tokyo:crest-jst
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KANODA Kazushi
Department of Applied Physics, University of tokyo
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IWASE Fumitatsu
Department of Applied Physics, University of Tokyo
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Kanoda Kazushi
Department Of Applied Physics The University Of Tokyo
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Tokura Yoshinori
Department Of Applied Physics University Of Tokyo:correlated Electron Research Center (cerc) Nationa
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Horiuchi Sachio
Correlated Electron Research Center (cerc) Aist
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Horiuchi Sachio
Correlated Electron Research Center (cerc) National Institute Of Advanced Industrial Science And Tec
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Miyagawa Kazuya
Department Of Applied Mathematics Faculty Of Engineering Science Osaka University
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Tokura Yoshinori
Department Of Applied Physics And Quantum Phase Electronics Center University Of Tokyo
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Kanoda Kazushi
Department Of Applied Physics University Of Tokyo:crest Japan Science And Technology Agency (jst)
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Miyagawa Kazuya
Department Of Applied Physics University Of Tokyo:crest Japan Science And Technology Agency (jst)
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Iwase Fumitatsu
Department Of Applied Physics University Of Tokyo
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