Spin-charge conversion with noncentrosymmetric materials

2016 Fiscal Year Final Research Report

• Project/Area Number: 15H05458
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Seki Shinichiro 国立研究開発法人理化学研究所, 創発物性科学研究センター, ユニットリーダー (70598599)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: スピントロニクス

Outline of Final Research Achievements

In this work, we attempted to observe spin-charge conversion caused by inverse Edelstein effect associated with the spin-splitting in noncentrosymmetric bulk semiconductors. While we first tried spin-pumping experiments for ferromagnet/semiconductor interfaces, it turned out that the contribution from interface is more significant than the underlying bulk itself and we couldn't observe the selection rule as expected. To overcome this issue, we have performed the magneto-photocurrent measurements, and observed the photo-induced voltage signals along the direction consistent with the symmetry of noncentrosymmetric bulk crystal structures.

Free Research Field

物性物理