Innovative synthesis of the perovskite-type hydrides and development of their basic physical-properties: creation of new properties and functions

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540356
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: KATO Masatsune 東北大学, 工学(系)研究科(研究院), 准教授 (50211850)
• Co-Investigator(Renkei-kenkyūsha): KOIKE Yoji 東北大学, 大学院工学研究科, 教授 (70134038)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 水素化合物 / 超伝導 / ペロブスカイト構造

Outline of Final Research Achievements

In the hydride compounds with the perovskite-type structure, the valence of hydrogen ions is -1 so that the valence of the cations cannot become large from the charge neutrality. This leads to the small electronic band-overlap between hydrogen and cation, indicating small covalency, namely weak electron-phonon interaction which is important for the appearance of superconductivity. In conclusion, we have obtained the useful information that oxyhydride compounds are preferable to hydride compounds for the high-temperature superconductors. Moreover, we have found the addition of platinum powder is very effective for the hydrogenation due to its catalysis. In summary, we have obtained some basic information to obtain the guideline for the creation of new functions and physical properties, including new high-temperature superconductivity, in the compounds with hydrogen.

Free Research Field

工学