Fabrication of superconducting quantum vortex cells

2016 Fiscal Year Final Research Report

• Project/Area Number: 26600011
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: The University of Electro-Communications
• Principal Investigator: KOKUBO NOBUHITO 電気通信大学, 大学院情報理工学研究科, 准教授 (80372340)
• Co-Investigator(Renkei-kenkyūsha): Okayasu Satoru 国立研究開発法人日本原子力研究開発機構, 先端基礎研究センター, 研究主幹 (50354824) ; Nojima Tsutomu 東北大学, 金属材料研究所, 准教授 (80222199)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 超伝導材料・素子 / 量子渦 / メゾスコピック系 / 走査プローブ顕微鏡 / 低温物性

Outline of Final Research Achievements

We have fabricated superconducting quantum-vortex based functional logic gates composed of micro-structured mesoscopic antidot squares, in which a pair of vortices is used as an information bit. We successfully induced the same number of quantum vortices in each quantum vortex cell and observed the initial state of the logic gate with the scanning SQUID magnetic microscope. Although the problem remains in the control of the logic state by a current pulse, our research findings are useful for vortex-based, prospective applications, including the vortex-based cellular automata.

Free Research Field

数物系科学