Spin-pump-induced spin transport in -type Si at room temperature

Shiko, Eiji*; Ando, Kazuya*; Kubo, Kazuki*; Saito, Eiji; Shinjo, Teruya*; Shiraishi, Seiji*

A spin battery concept is applied for the dynamical generation of pure spin current and spin transport in -type silicon (-Si). Ferromagnetic resonance and effective s-d coupling in NiFe results in spin accumulation at the NiFe/-Si interface, inducing spin injection and the generation of spin current in the -Si. The pure spin current is converted to a charge current by the inverse spin Hall effect of Pd evaporated onto the -Si. This approach demonstrates the generation and transport of pure spin current in -Si at room temperature.