Spin Freezing Crossover and Cooper Pairing Symmetry in the Organic Strange Metal kappa-(ET)4Hg2.89Br8 and kappa-(ET)4Hg2.78Cl8

有机奇异金属kappa-(ET)4Hg2.89Br8和kappa-(ET)4Hg2.78Cl8中的自旋冷冻交叉和库珀配对对称性

• 批准号: 21K13885
• 负责人: Dita PuspitaSari
• 金额: $ 2.91万
• 依托单位: Shibaura Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K13885/
• 关键词: Penetration depth; Knight shift; strange metal; non-Fermi liquid; Cooper pair; Strange metal; Spin freezing; SYK model; Hubbard model; Non-Fermi liquid; QCP; AdS/CFT correspondence

In this year we have performed Transverse-field muSR experiment on k-HgBr for the first time (in the perpendicular mode) obtaining in-plane penetration depth order parameter. The additional measurement is necessary to improve signal-noise ratio. We got our following muSR proposal approved and plan to add the sample mass.In the k-HgCl Zero-field muSR measurement also has been done in k-HgCl down to 25 miliK for the first time. There is no obvious signature of long-range ordered.Furthermore, we have developed a technique to measure dc-susceptibility for this series samples (plate-like shape crystal) to get a precise temperature dependence of susceptibility. We aim to report the plot of muon Knight shift vs susceptibility, comparing between those in k-HgBr and k-HgCl.

在今年，我们已经进行了横向场muSR实验的k-HgBr的第一次（在垂直模式）获得面内穿透深度序参量。为了提高信噪比，需要进行额外的测量。我们已经批准了我们的muSR方案，并计划增加样品质量。在k-HgCl零场muSR测量中，也首次在k-HgCl中进行了低至25 miliK的测量。此外，我们发展了一种测量该系列样品（片状晶体）直流磁化率的技术，以获得磁化率的精确温度依赖性。我们的目的是报告的μ子奈特位移与磁化率的曲线，比较在k-HgBr和k-HgCl。

项目成果

μSR study of κ-(ET)4Hg2.89Br8 and κ-(ET)4Hg2.78Cl8

κ-(ET)4Hg2.89Br8 和 κ-(ET)4Hg2.78Cl8 的 μSR 研究

• 发表时间: 2022
• 作者: D. P. Sari;Y. Cai;U. Widyaiswari;E. Yamada;Y. Someya; M-V. deToro Sanchez;K. M. Kojima;I. Watanabe;H. Taniguchi;Y. Ishii,
• 通讯作者: Y. Ishii,

Superconductivity nearby quantum critical region in hole-doped organic strange metal κ-(ET)₄Hg_3-δBr₈, δ=11%

空穴掺杂有机奇异金属κ-(ET)₄Hg_3-δBr₈中量子临界区附近的超导性, δ=11%

• DOI: 10.1088/1742-6596/2462/1/012061
• 发表时间: 2023
• 期刊: Journal of Physics: Conference Series
• 作者: Sari D P;Kaito M;Someya Y;Widyaiswari U;Watanabe I;Taniguchi H;Ishii Y
• 通讯作者: Ishii Y

TRIUMF(カナダ)

凯旋（加拿大）

μ+SR Study of κ-(ET)4Hg3-δBr8 (δ=0.11) and κ-(ET)4Hg3-δCl8 (δ=0.22) Part II

κ-(ET)4Hg3-δBr8 (δ=0.11) 和 κ-(ET)4Hg3-δCl8 (δ=0.22) 的 μ+SR 研究第二部分

• 发表时间: 2022
• 作者: D. P. Sari;Y. Cai;U. Widyaiswari;E. Yamada;M-V. deToro Sanchez;Y. Someya;A. Koda;K. M. Kojima;I. Watanabe;Y. Ishii;and H. Taniguchi
• 通讯作者: and H. Taniguchi

μ+SR Study of κ-(ET)4Hg3-δBr8 (δ=0.11) and κ-(ET)4Hg3-δCl8 (δ=0.22)

κ-(ET)4Hg3-δBr8 (δ=0.11) 和 κ-(ET)4Hg3-δCl8 (δ=0.22) 的 μ+SR 研究

• 发表时间: 2022
• 作者: Dita P. Sari;Y. Cai;M-V. deToro Sanchez;K. M. Kojima;I. Watanabe;A. Koda;Y. Ishii;H. Taniguchi
• 通讯作者: H. Taniguchi