Experimental Study of Novel Quantum Phases and Criticality in Multipolar Kondo Materials

多极近藤材料中新型量子相和临界性的实验研究

• 批准号: 20F20028
• 负责人: 中辻 知
• 金额: $ 1.47万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-24 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20F20028/
• 关键词: Strongly correlation; Non-Fermi-liquids; Quantum criticality; Multipolar Kondo effect; Superconductivity; Strongly correlated; electrons

Over the past two years, we comprehensively characterized the field-induced quantum criticality of the multipolar Kondo system PrV2Al20 using electrical transport and thermodynamic probes. We succeeded in detecting universal scaling in magnetoresistance, Shubnikov-de Haas oscillations, and a drastic rise in the Hall coefficient on approaching the quantum critical regime. We further performed low-temperature and high-field specific heat and magnetization measurements, which yielded high-precision thermodynamic information on the non-Fermi liquid phase intrinsic to the multipolar Kondo effect. This study leads to profound insights into the non-Fermi-liquid behavior generated by the multipolar Kondo effect and the changes in Fermi surface properties near the multipolar quantum critical point.

在过去的两年中，我们全面的特点是场诱导的量子临界的多极近藤系统PrV 2Al 20使用电输运和热力学探针。我们成功地检测到普遍缩放的磁阻，舒布尼科夫-德哈斯振荡，并在霍尔系数接近量子临界制度急剧上升。我们进一步进行了低温和高场比热和磁化测量，这产生了高精度的非费米液相的多极近藤效应固有的热力学信息。这一研究对多极近藤效应产生的非费米液体行为以及多极量子临界点附近费米表面性质的变化有了深刻的认识。

项目成果

中辻研究室

中辻实验室

Evidence for the quadrupolar Kondo effect in the heavy fermion superconductor PrV2Al20

重费米子超导体 PrV2Al20 中四极近藤效应的证据

• 发表时间: 2020
• 作者: 中村壮智;橋本義昭;勝本信吾;nan Tang;Tomoya Higo;Muhammad Ikhlas;Mingxuan Fu
• 通讯作者: Mingxuan Fu

Non-Fermi Liquid Phenomena and Novel Quantum Criticality in the Multipolar Kondo System PrV2Al20

多极近藤系统 PrV2Al20 中的非费米液体现象和新量子临界性

• 发表时间: 2021
• 作者: 肥後 友也;酒井 明人;三輪 真嗣;中辻 知;Mingxuan Fu
• 通讯作者: Mingxuan Fu