Metal-insulator transition of liquid metals near the critical point studied by muSR technique

• Project/Area Number: 22604011
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: KODA Akihiro 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 研究機関講師 (10415044)
• Co-Investigator(Kenkyū-buntansha): TAKESHITA Nao 産業技術総合研究所, 電子光技術研究部門, 研究員 (60292760)
• Project Period (FY): 2010-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2013: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2012: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: 金属絶縁体転移 / 強相関電子系 / 物性実験 / 粒子線 / ミューエスアール法 / 超臨界金属 / 高圧物性

Outline of Final Research Achievements

It is proposed to investigate the metal-insulator transition of liquid metals near the critical point by using muon spin relaxation (muSR) technique. In order to achieve this, we have started to establish experimental techniques at high-pressures and high-temperatures. It turned out that high intensity current to raise the sample temperature by Joule heating induces magnetic field, which is not negligible for the muSR experiment. Further consideration to improve the problem was suspended due to several troubles happened at J-PARC in recent years. On the other hand, it was found that an anvil material AN1800 is suitable for the high-pressure cell employed in muSR experiments.
In summary, the planned experiment have not been perfomed yet, because of undesirable events mentioned above.