Investigation of novel crystal structure and superconductivity of hydrogen-rich molecule under ultra-high pressure

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K03514
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: Gifu University (2020); Osaka University (2018-2019)
• Principal Investigator: Sakata Masafumi 岐阜大学, 工学部, 准教授 (30378559)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 水素化物超伝導体 / 水素リッチな分子 / 超高圧物性

Outline of Final Research Achievements

Investigation for synthesis of hydride superconductor under ultra-high pressure was performed using hydrogen-rich molecule as starting material. As a result, superconducting behavior was observed on thiourea having N-H-S hydrogen bond in a crystal structure under the pressure above 160 GPa. It suggests that hydrogen bond in a starting material is important for synthesis of superconducting hydride under high pressure.

Free Research Field

高圧物性科学

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、これまで不明であった分子性物質を出発物質とした超高圧力下での水素化物超伝導体の合成に対して、「水素結合」の重要性を示した。これは、今後の非金属元素の水素化物超伝導体研究において、重要な指針となると考えられる。