Anisotropic magnetic field effect on fluctuating superconductivity in a strongly electron correlated system

强电子相关系统中各向异性磁场对脉动超导性的影响

• 批准号: 24740246
• 负责人: TSUCHIYA Satoshi
• 金额: $ 2.83万
• 依托单位: Hokkaido University (2013)National Institute for Materials Science (2012)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24740246/
• 关键词: 超伝導ゆらぎ; 強相関系超伝導; 2次元性; 有機超伝導体; 強相関電子

Recently, fluctuating superconductivity (FSC) have attracted attention because it will be one of the most intriguing interpretations of the pseudogap formation, which is likely an intrinsic property in strongly correlated two-dimensional (2D) superconductors. Although a number of experiments has been performed to reveal origin of FSC, it remains unclear so far. In this study, to investigate the origin, we have performed the resistance and magnetic torque measurements for four kinds of superconductors (organics and cuprates), which have different transition temperatures (Tc), electron correlation and dimensionality, respectively. As a result, the FSC was observed in all of the superconductors irrespective of the electron correlation strength and magnitude of Tc. Instead, the temperatures where the FSC appears, tend to enhance in the high 2D sample. Consequently, the origin of FSC can connect to dimensionality rather than the electron correlation and Tc.

最近，涨落超导性（FSC）引起了人们的关注，因为它将是赝能隙形成的最有趣的解释之一，赝能隙形成可能是强关联二维（2D）超导体的本征性质。虽然已经进行了大量的实验来揭示FSC的起源，但到目前为止仍然不清楚。在这项研究中，调查的起源，我们进行了电阻和磁矩的四种超导体（有机物和铜酸盐），这具有不同的转变温度（Tc），电子相关和维数，分别测量。结果表明，无论电子相关强度和Tc的大小，在所有的超导体中都观察到了FSC。相反，FSC出现的温度在高2D样品中趋于增强。因此，FSC的起源可能与维数有关，而不是与电子关联和Tc有关。

项目成果

Magnetic torque study on fluctuating superconductivity for Bi2Sr2CaCu2O8+x

Bi2Sr2CaCu2O8 x 脉动超导磁力矩研究

• 发表时间: 2013
• 作者: S Tsuchiya;T. Mochiku;S. Ooi;K. Hirata;K. Sugii;T. Terashima;S. Uji
• 通讯作者: S. Uji

High-magnetic-field phase diagram of an organic superconductor k-(BEDT-TTF)2Cu(NCS)2

有机超导体 k-(BEDT-TTF)2Cu(NCS)2 的高磁场相图

• 发表时间: 2012
• 作者: S. Tsuchiya;J. Yamada;T. Terashima;N. Kurita;K. Kodama;K.Sugii;D. Graf;J. S. Brooks;S. Uji
• 通讯作者: S. Uji

Systematic Studies of Fluctuating Superconductivity under In-plane Magnetic Field forα- andκ-Type Organic Superconductors

α型和κ型有机超导体面内磁场下脉动超导性的系统研究

• 发表时间: 2012
• 作者: S. Tsuchiya;D. Fischer;K. Sugii;K. Miyagawa;K. Kanoda;H. Taniguchi;T. Terashima;and S. Uji
• 通讯作者: and S. Uji

Systematic Studies of Fluctuating Superconductivity under In-plane Magnetic Field for k- and a-Type Organic Superconductors

k型和a型有机超导体面内磁场下脉动超导性的系统研究

• 发表时间: 2012
• 作者: S. Tsuchiya;D. Fischer;K. Sugii;K. Miyagawa;K. Kanoda;H. Taniguchi;T. Terashima;S. Uji
• 通讯作者: S. Uji

Fluctuating superconductivity in the strongly correlated two-dimensional organic superconductor k-(BEDT-TTF)2Cu(NCS)2 in an in-plane magnetic field

面内磁场中强相关二维有机超导体 k-(BEDT-TTF)2Cu(NCS)2 的涨落超导性

• DOI: 10.1103/physrevb.85.220506
• 发表时间: 2012
• 期刊: Phys. Rev. B
• 作者: K. Katono;K. Ichimura;Y. Kawashima;K. Yamaya and S. Tanda;S. Tsuchiya et al.
• 通讯作者: S. Tsuchiya et al.