Enhancement of Tc of infinite layer NdNiO2 by lattice strain

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K14778
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: University of Yamanashi (2021); Seikei University (2020)
• Principal Investigator: Sakuma Keita 山梨大学, 大学院総合研究部, 助教 (30781976)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 超伝導 / 歪 / 薄膜 / 無限層

Outline of Final Research Achievements

Recently, a newly discovered infinite layer RENiO2 has the potential to exhibit a superconducting transition temperature higher than that of cuprate superconductors. In this study, we have succeeded in fabricating the parent material RENiOy thin film on single crystal substrate by TFA-MOD method. Although the superconducting transition was not observed, the reduction process gave the semiconducting to metallic properties. RENiOy thin films were fabricated on BaxSr1-xTiO3 buffer layers with various Ba/Sr compositions. enabling the application of strain to the RENiOy thin films. RENiOy thin films were epitaxially grown on BaxSr1-xTiO3 buffer layers.

Free Research Field

機能性材料

Academic Significance and Societal Importance of the Research Achievements

「超伝導」は健康寿命の延伸やクリーンで省エネルギー社会の実現の一端を担っているが、極低温まで冷却する必要があり、超伝導転移温度の向上が必要とされる。本研究で開発した「酸素量制御」「歪制御」技術は、他の機能性材料にも適用可能であり、新たな機能性制御機構としても期待できる。