Electrical conductivity and dielectric constant of organic crystals in high frequency region

有机晶体高频区的电导率和介电常数

• 批准号: 62470002
• 负责人: KINOSHITA Minoru
• 金额: $ 4.03万
• 依托单位: Institute for Solid State Physics, University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62470002/
• 关键词: Organic Conductor; Organic Superconductor; Electrical Conductivity; BEDT-TTF; Cation Radical Salt; Microwave Conductivity Measurements; 有機伝導体; 有機超伝導体; 電気伝導度; 高周波伝導度; 誘電率; 反射スペクトル; 電子常磁性共鳴; 有機導電体; BEDTーTTF錯体; 直流伝導度; 有機結晶

1. The electrical conductivity of organic conductors based on bis(ethylenedithio)-tetrathiafulvalene(BEDT-TTF or ET) has been studied by conductivity measurements in the dc, ac, and optical regions.(1) Several ET cation radical salts with the counter anion of AuI_2 are synthesized electrochemically and their electrical conductivities are measured. A new modification, exhibiting a metal-insulator transition, has been found.(2) The (ET)_2 [Cu(NCS)_2] salt has been found to be an ambient-pressure organic superconductor, which has T = 10.4 K, the highest T so far found in organics.(3) Prominent magnetic interaction between itinerant electron spins and localized electron spins has been found in the CoCl_4^<2-> and MuCl_4^<2-> salts of ET, at least the former being an organic conductor.2. In addition, an apparatus for conductivity and dielectric constant measurements had been constructed using a reflection type microwave cavity, which facilitates the measurements without electrode contacts and in the temperature region of 4 - 300 K.

1. 通过直流、交流和光学区域的电导率测量，研究了基于双(乙撑二硫)-四硫富瓦烯(BEDT-TTF或ET)的有机导体的电导率。(1) 几种ET阳离子自由基盐的计数器电化学合成了AuI_2的阴离子并测量了它们的电导率。发现了一种表现出金属-绝缘体转变的新变体。(2) (ET)_2 [Cu(NCS)_2]盐被发现是一种常压有机超导体，其T = 10.4 K， (3)在CoCl_4^<2->和MuCl_4^<2->中发现了巡回电子自旋和局域电子自旋之间显着的磁相互作用。 ET的盐，至少前者是有机导体。2．此外，还利用反射型微波腔构建了电导率和介电常数测量装置，便于在4-300 K温度范围内无电极接触进行测量。

项目成果

SUGANO, Tadashi: "Bulk superconductivity in (BEDT-TTF)_2[Cu(NCS)_2]" Chemistry Letters. 1171-1174 (1988)

SUGANO, Tadashi：“(BEDT-TTF)_2[Cu(NCS)_2] 中的体超导性”化学快报。

SUGANO, Tadashi: "Magnetic and optical properties of an ambient-pressure organic superconductor (BEDT-TTF)_2 [Cu(NCS)_2]" Synthetic Metals. 27. 325-330 (1988)

SUGANO, Tadashi：“常压有机超导体 (BEDT-TTF)_2 [Cu(NCS)_2] 的磁和光学特性”合成金属。

野澤清和: Chemistry Letters. 617-620 (1988)

野泽清和：化学快报 617-620 (1988)

SUGANO, Tadashi: "Infrared conductivity and electron-molecular vibration coupling in the organic superconductor di[bis(ethylenedithio)tetrathiafulvalene]bis(isothiocyanate)cuprate(I), k-(BEDT-TTF)_2[Cu(NCS)_2]: Protonated and deuterated salts" Physical Re

SUGANO, Tadashi：“有机超导体二[双(亚乙二硫)四硫富瓦烯]双(异硫氰酸酯)铜酸盐(I)，k-(BEDT-TTF)_2[Cu(NCS)_2]中的红外电导率和电子-分子振动耦合：

菅野忠: Synthetic Metals. 27. A325-A330 (1988)

菅野正：合成金属。27.A325-A330 (1988)