Anomalous Splitting of ^1H-NMR Spectra in λ-(BEDT-TSF)_2FeCl_4

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概要

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• For an organic π-d metal λ-(BEDT-TSF)_2FeCl_4, where BEDT-TSF is an abbreviation of bis(ethylenedithio)tetraselenafulvalene, we have measured ^1H-NMR to clarify the quite anomalous ferroelectric-like metallic states below T_<FM> = 70K recently found in the microwave conductivity and specific heat measurements as well as the metal-to-insulator transition at T_MI = 8.3K associated with antiferromagnetic ordering. Just at the temperature T_<FM>, the second-order ferroelectric-like phase transition temperature, a single peak at higher temperatures of 100K and 80K starts to split into three asymmetric peaks, which are analyzed by Gaussian deconvolution with three components. It is considered that this anomalous splitting of the NMR spectra is attributed to the hyperfine field between the proton nucleus and π electrons. This anomaly at T_<FM> is discussed in terms of a charge disproportionation.

• 社団法人日本物理学会の論文
• 2002-03-15

著者

• NEGISHI Eiichi

  Physics Department, Graduate School of Science, Tohoku University

• MATSUI Hiroshi

  Physics Department, Graduate School of Science, Tohoku University

• TOYOTA Naoki

  Physics Department, Graduate School of Science, Tohoku University

• Endo S

  Osaka Univ. Osaka

• Endo S

  Research Center For Materials And Science At Extreme Conditions Osaka University

• Endo S

  Center For Interdisciplinary Research Tohoku University

• Hedo M

  Institute For Solid State Physics University Of Tokyo

• Matsui H

  Graduate School Of Science Osaka University

• Toyota N

  Physics Department Graduate School Of Science Tohoku University

• Namiki Takahisa

  Institute For Materials Research Tohoku University

• Toyota Naoki

  Physics Department Graduate School Of Science Tohoku University

• Toyota Naoki

  Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc

• Fukase Tetsuo

  Institute For Materials Research Tohoku University

• Goto Takayuki

  Department Of Physics Sophia University

• Negishi E

  Physics Department Graduate School Of Science Tohoku University

• Negishi Eiichi

  Physics Department Graduate School Of Science Tohoku University

• Tateiwa Naoyuki

  Graduate School Of Science Tohoku University:(present) Department Of Physical Science Graduate Schoo

• UOZAKI Hiroshi

  Physics Department, Graduate School of Science, Tohoku University

• TSUCHIYA Hideaki

  Physics Department, Graduate School of Science, Tohoku University

• ABE Yasunori

  Physics Department, Graduate School of Science, Tohoku University

• ISHIZAKI Yusuke

  Physics Department, Graduate School of Science, Tohoku University

• ENDO Satoshi

  Center for Interdisciplinary Research, Tohoku University

• Goto Takayuki

  Department Of Physics Faculty Of Science And Technology Sophia University

• Minaguchi Hiroshi

  Department Of Obstetrics And Gynecology Yokohama City University School Of Medicinedepartment Of Obs

• Endo S

  Osaka Univ. Toyonaka Jpn

• Endo Satoshi

  Center For Interdisciplinary Research Tohoku University

• Matsui Hiroshi

  Graduate School Of Science Osaka University

• Fukase Tetsuo

  Institute For Material Research Tohoku University

• 遠藤 三郎

  Center For Interdisciplinary Research Tohoku University

• Abe Yasunori

  Physics Department Graduate School Of Science Tohoku University

• Uozaki Hiroshi

  Department Of Pathology And Diagnostic Pathology Graduate School Of Medicine University Of Tokyo

• Mukuda Hidekazu

  Graduate School Of Science Osaka University

• Tsuchiya H

  Physics Department Graduate School Of Science Tohoku University

• Ishizaki Y

  Physics Department Graduate School Of Science Tohoku University

• Matsui Hiroshi

  Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc

• Matsui Hiroshi

  Physics Department Graduate School Of Science Tohoku University

• Muranaka Hiroshi

  Graduate School Of Science Osaka University

• Matsui Hiroshi

  Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc

• Terada N

  Musashi Inst. Technology Tokyo

• Fukase Tetsuo

  Institute for Materials Research, Tohoku University

• Ishizaki Yusuke

  Physics Department, Graduate School of Science Tohoku University, Sendai 980-8578

• Uozaki Hiroshi

  Physics Department, Graduate School of Science Tohoku University, Sendai 980-8578

• Tsuchiya Hideaki

  Physics Department, Graduate School of Science Tohoku University, Sendai 980-8578

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