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.通过在直流、交流和光学区域的电导率测量，研究了基于双（亚乙基二硫）-四硫富瓦烯（BEDT-TTF或ET）的有机导体的电导率。(1)本文用电化学方法合成了几种ET阳离子自由基与AuI_2抗衡阴离子的盐，并测定了它们的电导率。一个新的修改，表现出金属-绝缘体转变，已被发现。(2)（ET）_2 [Cu（NCS）_2]盐是一种常压有机超导体，其T = 10.4K，是迄今为止在有机物中发现的最高T。(3)在ET的CoCl_4 ~+和MuCl_4 ~+盐中发现了明显的巡游电子自旋和局域电子自旋之间的磁相互作用<2-><2->，至少前者是有机导体.此外，还研制了一种反射式微波谐振腔测量电导率和介电常数的装置，该装置可在4 ~ 300 K温度范围内进行无电极接触的测量。

项目成果

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：

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

野泽清和：化学快报 617-620 (1988)

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。

浦山 初果: Chemistry Letters. 55-58 (1988)

浦山初香：化学快报 55-58 (1988)

菅野忠: Physical Review B. 37. 9100-9102 (1988)

菅野正：《物理评论》B.37.9100-9102 (1988)