Spin-signal propagation in time-dependent noncollinear spin transport

Details Spin-signal propagation in time-dependent noncollinear spin transport Spin-signal propagation in time-dependent noncollinear spin transport

2008-12-22

arxiv.org/abs/0812.4215v2

Physics

Condensed Matter

Materials Science

7 pages, 4 figures

Scientific paper

Using a macroscopic analysis, we show that time-dependent noncollinear spin transport possesses a wavelike character. This leads to modifications of pure spin-diffusion dynamics and allows one to extract a finite spin-signal propagation velocity. We numerically study the dynamics of a pure spin current pumped into a nonmagnetic layer for precession frequencies ranging from GHz to THz.

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