2021 Fiscal Year Annual Research Report

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

Research Project

Project/Area Number	20F20028
Research Institution	The University of Tokyo
Principal Investigator	中辻知東京大学, 大学院理学系研究科(理学部), 教授 (70362431)
Co-Investigator(Kenkyū-buntansha)	FU MINGXUAN 東京大学, 理学(系)研究科(研究院), 外国人特別研究員
Project Period (FY)	2020-04-24 – 2022-03-31
Keywords	Strongly correlation / Non-Fermi-liquids / Quantum criticality / Multipolar Kondo effect / Superconductivity
Outline of Annual Research Achievements	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.
Research Progress Status	令和3年度が最終年度であるため、記入しない。
Strategy for Future Research Activity	令和3年度が最終年度であるため、記入しない。