多極子近藤系における新しい量子相とその量子臨界現象の実験的研究
【研究キーワード】
Strongly correlation / Non-Fermi-liquids / Quantum criticality / Multipolar Kondo effect / Superconductivity / Strongly correlated / electrons
【研究成果の概要】
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.
【研究代表者】
【研究種目】特別研究員奨励費
【研究期間】2020-04-24 - 2022-03-31
【配分額】2,300千円 (直接経費: 2,300千円)