Effective theory of magnetic monopole in spin transport

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400344
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Tatara Gen 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, チームリーダー (10271529)
• Research Collaborator: SHIBATA Junya 東洋大学, 理工学部, 准教授 (20391972) ; TAKEUCHI Akihito 青山学院大学, 理工学部, 助教 (80738328) ; KONO Hiroshi 名古屋大学, 理学部, 教授 (10234709)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: スピン電荷変換 / スピン流

Outline of Final Research Achievements

Conversion of spin to other degrees of freedom is essential in spintronics. We have studied the conversion mechanisms of spin to electric current and light by a microscopic theory and obtained the following results. We have shown that the spin-charge conversion induced by spin-orbit interaction is described in terms of an effective electromagnetic field acting on electron spin. This effective field is an extension of spin Berry's phase to include spin-orbit interaction. We further demonstrated that the effective electromagnetic field results in a directional dichroism for light by causing the Doppler shift with respect to the intrinsic flow of electron spin. We have also presented a thermal vector potential formulation for describing thermal transport phenomena.

Free Research Field

スピントロニクス理論