Spin mechatronics: Mechanical generation of spin current
- Date: Dec 7, 2018
- Time: 10:30
- Speaker: Prof. Sadamichi Maekawa
- RIKEN Center for Emergent Matter Science, Wako, Japan and Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing, China
- Location: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle (Saale)
- Room: Lecture Hall, B.1.11
The study on coupling between magnetism and mechanical rotation has a long history [1,2]. The phenomena due to the coupling are caused by the angular momentum conservation between electron spin and mechanical rotation, which has been proved in the general relativistic quantum mechanics . We introduce mechanical effects in spintronics and propose a variety of novel spintronics phenomena . We have observed the generation of spin current by the flow of liquid metals . Combining this effect with the spin Hall effect, the spin-hydrodynamic generation of electricity is obtained . We also show the spin current generation by surface acoustic waves in normal metals . The mechanical generation of spin current opens a door from “Spintronics” to "Spin-Mechatronics".
 A.Einstein and W.J.de Haas, Verhandl.Deut.Physik.Ges, 17,154 (1915).
 S.J.Barnett, Phys. Rev. 6, 239 (1915).
 M.Matsuo, J.Ieda and S.Maekawa, Phys. Rev. Lett. 106, 076601 (2011).
 Spin Current (Second Edition), eds. S. Maekawa et al. (Oxford University Press, 2017).
 R.Takahashi, M.Ono, K.Harii, S.Okayasu, M.Matsuo, J.Ieda, S.Takahashi, S.Maekawa and E.Saitoh, Nature Phys. 12, 52 (2015).
 M.Matsuo, Y.Ohnuma and S.Maekawa: Phys. Rev. B96, 020401(R)(2017).
 D.Kobayashi,T.Yoshikawa,M.Matsuo,R.Iguchi,S.Maekawa,E.Saitoh and Y.Nozaki, Phys. Rev. Lett. 119, 077202 (2017).