2009 Fiscal Year Final Research Report
Study of the charge-transfer salts with inhomogeneous electronic structure focusing on a charge-order system
| Project/Area Number |
19350074
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Institute for Molecular Science |
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Principal Investigator |
YAKUSHI Kyuya Institute for Molecular Science, 物質分子科学研究領域, 教授 (20011695)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Kaoru 分子科学研究所, 物質分子科学研究領域, 助教 (90321603)
URUICHI Mikio 分子科学研究所, 技術課, 技術職員 (70390680)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 分子導体 / 電荷移動塩 / 電荷秩序 / 相転移 / 赤外ラマン分光 / 反射分光 |
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| Research Abstract |
We have investigated the inhomogeneous electronic states of charge-ordered system which consists of M_2^+X^- composition. (1) We found an inhomogeneous coexistence phase of high- and low-temperature phases in a wide transition-temperature region. (2) We found an inhomogeneous coexistence phase near the superconducting phase in high-pressure and low-temperature region of electronic phase diagram. (3) Ferroelectric domains of electron ferroelectrics were observed using the interference method combined with SHG microscope. (4) We have shown that the high-conductivity state near a charge-ordered phase is not metallic but dynamically localized.
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[Journal Article] Superconductivity competitive with checkerboard-type charge ordering in organic conductor β-(meso-DMBEDT-TTF)_2PF_62009
Author(s)
N. Morinaka, K. Takabayashi, R. Chiba, F. Yoshikane, S. Niizeki, M. Tanaka, K. Yakushi, M. Koeda, M. Hedo, T. Fujiwara, Y. Uwatoko, Y. Nishio, K. Kajita, H. Mori
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Journal Title
Phys. Rev. B 80
Pages: 092508 (4)
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[Journal Article] Room Temperature First-Order Phase Transition in a Molecular Conductor (MeEDO-TTF)2PF62008
Author(s)
Xiangfeng Shao, P* Yoshiaki Nakano, P Masafumi Sakata, P Hideki Yamochi, P* Yukihiro Yoshida, P Mitsuhiko Maesato, P Mikio Uruichi, P Kyuya Yakushi, PP Tsuyoshi Murata, P Akihiro Otsuka, PP Gunzi Saito, P Shin-ya Koshihara, Koichiro Tanaka
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Journal Title
Chem. Mater. 20
Pages: 7551-7562
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[Journal Article] nfrared and Raman spectroscopic study of BDA-TTP [1, 5-bis(1, 3-dithian-2-ylidene)-1, 3, 4, 6-tetrathiapentalene] and its charge-transfer salts2008
Author(s)
M. Uruichi, C. Nakano, M. Tanaka, K. Yakushi, T. Kaihatsu, J. Yamada
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Journal Title
Solid State Commun 47
Pages: 484-489
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[Journal Article] Inhomogeneous site-charges at the boundary between the insulating, superconducting, and metallic phases of β"-type ET molecular charge-transfer salts, (ET=bisethylene-dithiatetrathiafulvalene)2008
Author(s)
T. Yamamoto, H.M. Yamamoto, R. Kato, M. Uruichi, K. Yakushi, H. Akutsu, A. Sato-Akutsu, A. Kawamoto, S.S. Turner, P. Day
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Journal Title
Phys. Rev. B 77
Pages: 205120 (14)
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[Presentation] Charge fluctuation of the superconducting molecular crystals2009
Author(s)
T. Yamamoto, Y. Nakazawa, R. Kato, K. Yakushi, H. Akutsu, A. -S. Akutsu, H. Yamamoto, S.S. Turner, P. Day
Organizer
The 8th international symposium on crystalline organic metals, superconductors, and Ferromagnets (ISCOM2009)
Place of Presentation
Niseko, Hokkaido
Year and Date
20090912-20090917
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[Presentation] Charge order-disorder phase transition inα'-(BEDT-TTF)2IBr22009
Author(s)
Y. Yue, C. Nakano, K. Yamamoto, M. Uruichi, K. Yakushi, M. Inokuchi, R. Wojciechowski, A. Kawamoto
Organizer
The 8th international symposium on crystalline organic metals, superconductors, and Ferromagnets (ISCOM2009)
Place of Presentation
Niseko, Hokkaido
Year and Date
20090912-20090917
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