研究課題/領域番号 |
21K13885
|
研究種目 |
若手研究
|
配分区分 | 基金 |
審査区分 |
小区分13030:磁性、超伝導および強相関系関連
|
研究機関 | 芝浦工業大学 |
研究代表者 |
|
研究期間 (年度) |
2021-04-01 – 2025-03-31
|
研究課題ステータス |
交付 (2022年度)
|
配分額 *注記 |
4,550千円 (直接経費: 3,500千円、間接経費: 1,050千円)
2024年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2023年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2022年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2021年度: 1,040千円 (直接経費: 800千円、間接経費: 240千円)
|
キーワード | 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 |
研究開始時の研究の概要 |
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.
|
研究実績の概要 |
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.
|
現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The penetration depth measurement needs to be improved to get solid and complete data set, although we earned the high-priority muSR beamtime at TRIUMF Canada from the proposal submission in January 2023.
|
今後の研究の推進方策 |
2023: We will perform Transverse-field muSR at TRIUMF in k-HgBr. The measurement at ISIS and JPARC is slightly shifted to 2024.
2024: Writing up main papers and execute a continuation.
|