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

• Project/Area Number: 21K13885
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: Shibaura Institute of Technology
• Principal Investigator: Dita PuspitaSari 芝浦工業大学, 工学部, 助教 (00821919)
• Project Period (FY): 2021-04-01 – 2025-03-31
• Project Status: Granted (Fiscal Year 2021)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2024: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: Cooper pair / Strange metal / Spin freezing / SYK model / Hubbard model

Outline of Research at the Start

The spin freezing crossover observed as a highly fluctuating spin in the metallic state and the Cooper pairing symmetry of two strange metal candidates known as a triangular lattice single-band Hubbard model system, k-(ET)4Hg2.89Br8 and k-(ET)4Hg2.78Cl8, will be studied by muon-spin relaxation.