Hybrid Superconductor - Ge/Si core/shell nanowire devices

2016 Fiscal Year Final Research Report

• Project/Area Number: 26790008
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Deacon Russell 国立研究開発法人理化学研究所, 石橋極微デバイス工学研究室, 研究員 (40552443)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 超伝導

Outline of Final Research Achievements

We study the spin orbit interaction in Ge/Si core/shell nanowires and identify short electrically tunable spin orbit lengths suitable for spin based electronic devices and the realization of Majorana Fermions. We develop techniques to produce transparent contacts to Ge/Si nanowires using high magnetic critical field　superconductors.　Toward　the　detection　of　Majorana　Fermions　we　develop　a　measurement　system to study the ac-Josephson effect in topological Josephson junction. Initial studies were performed on the well established　HgTe　based　topological　insulator　system　in　which　we　detect　evidence　for　a　4-pi　periodic　supercurrent expected for Majorana modes.

Free Research Field

固体物理