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作者:Kazuya Miyagawa , Tomofumi Kadoya ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2018, Vol.87 (9)
摘要:\(T_{1}^{- 1}\)]]> , show a commensurate antiferromagnetic order in a Mott insulating phase at low pressures and a strongly discontinuous Mott transition around 8 kbar. In the metallic state, the resistivity shows Fermi liquid behavior at low temperatures, whereas ( T 1...
作者:Kazuya Miyagawa , Yohta Sata ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (7)
摘要:The θ-(BEDT-TTF)2I3 system is suggested to be the second organic system of massless Dirac fermions, which emerge from the metallic phase at a pressure exceeding 5 kbar. We have performed 13C NMR measurements on a single crystal of θ-(BEDT-TTF...
作者:Kazuya Miyagawa , Tatsuya Miyamoto ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2015, Vol.84 (10)
摘要:We performed electrical resistivity measurements for the quasi-two-dimensional ionic Mott insulator M2P-TCNQF4 (M2P: 5,10-dihydro-5,10-dimethylphenazine, TCNQF4: 2,3,5-tetrafluoro-7,7,8,8-tetracyanoquinodimethane) under high pressures u...
作者:Takuro Sato , Kazuya Miyagawa , Kazushi Kanoda
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (12)
摘要:Glassy dynamics in the charge degrees of freedom in the organic conductor θ-(BEDT-TTF)2CsZn(SCN)4 is investigated through fluctuation spectroscopy. We observed the 1/ f -type noise spectrum over the temperature range studied (20 < T < 300 K). The analys...
作者:Kazuya Miyagawa , Motoaki Hirayama ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2010, Vol.79 (6)
摘要:We present the results of our13C NMR study of the quasi-two-dimensional organic conductor θ-(BEDT-TTF)2I3 under pressure, which is suggested to be a zero-gap conductor by transport measurements. We found that NMR spin shift is proportional to...
作者:Kazuya Miyagawa , Kazushi Kanoda ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2010, Vol.79 (4)
摘要:79Br NQR measurement is performed to determine the low-energy charge-transfer/dimerization fluctuations in the organic charge-transfer complex DMTTF–2,6-QBr2Cl2. With decreasing temperature, NQR line width gradually increases and the spin–lat...
作者:Kazuya Miyagawa , Kazushi Kanoda ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2008, Vol.77 (5)
摘要:We present the results of a1H NMR study of the single-component molecular conductor, [Au(tmdt)2]. A steep increase in the NMR line width and a peak formation of the nuclear spin–lattice relaxation rate, 1/ T 1, were observed at around 110 K. ...
作者:Kazuya Miyagawa , Shigeki Fujiyama ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2007, Vol.76 (7)
摘要:We report a35Cl NQR investigation into the neutral–ionic (NI) phase transition in DMTTF-QCl4 (4,4'-dimethyltetrathiafulvalene- p -chloranil), the end material of the family containing an NI quantum transition system. Four distinct lines with comparable ...
作者:Kazuya Miyagawa , Kazushi Kanoda ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2014, Vol.83 (8)
摘要:The critical cooling rate R c above which charge ordering is kinetically avoided upon cooling, which results in charge-glass formation, was investigated for the geometrically frustrated system θ-(BEDT-TTF)2 X . X-ray diffraction experiments revealed tha...

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