Theoretical study of spin transport in heterogeneous order state

2014 Fiscal Year Final Research Report

• Project/Area Number: 25887053
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: HIKINO Shin-ichi 独立行政法人理化学研究所, 柚木計算物性物理研究室, 基礎科学特別研究員 (80587923)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Keywords: 強磁性ジョセフソン接合 / 超伝導体 / 強磁性体

Outline of Final Research Achievements

1)We have theoretically predicted that long-range spin current is driven by phase difference between two superconductors in ferromagnetic Josephson junction. 2)We have shown that superconductor/ferromagnetic insulator/superconductor junction is a promising potential of this junction as spin pumping device by applying DC voltage.3)We have proposed how to observe the breathing mode of domain wall by the Josephson junction having a ferromagnetic layer, with a magnetic domain wall between superconducting electrodes. 4)We have theoretically studied the Josephson effect in a superconductor/normal metal/superconductor (S/N/S) Josephson junction composed of s-wave Ss with N which is sandwiched by two ferromagnetic insulators (Fs), forming a spin valve,in the vertical direction of the junction. We have shown that o-pi transition can be freely controlled. It is expected that result indicates a promising potential of this junction as a 0-pi switching device.

Free Research Field

物性理論