Development of tandem type on-demand superconducting device of oxide degenerate semiconductor / nitride superconductor

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420334
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: National Institute of Information and Communications Technology
• Principal Investigator: Makise Kazumasa 国立研究開発法人情報通信研究機構, 未来ICT研究所フロンティア創造総合研究室, 主任研究技術員 (60363321)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 超伝導ー絶縁体転移 / トンネル接合 / 酸化物薄膜 / 窒化物薄膜

Outline of Final Research Achievements

The Josephson junction has been a subject of a large number of studies. Ordinary a Josephson junction basically consists of superconductor-insulator-superconductor (SIS) tunnel junctions. Al/AlOx/Al and Nb/AlOx/Nb Josephson junctions are generally used for superconducting application. On the other hand, various superconducting devices have been proposed. For example, there is an electric field-controlled Josephson junction. The device consists of a coplanar superconductor-semiconductor-superconductor Josephson junction with insulated gate formed over the semiconducting channel.　We have fabricated the NbN/IZO/NbN junction and carried out electrical transport measurements/. Non-linear I-V characteristics appeared below 10K by superconductivity of NbN electrode and showed diode-like behavior.

Free Research Field

超伝導