Modeling spin transport with current-sensing spin detectors

Details Modeling spin transport with current-sensing spin detectors Modeling spin transport with current-sensing spin detectors

2009-08-03

arxiv.org/abs/0908.0250v3

Appl. Phys. Lett. 95, 152501 (2009)

Physics

Condensed Matter

Materials Science

Scientific paper

By incorporating the proper boundary conditions, we analytically derive the impulse response (or "Green's function") of a current-sensing spin detector. We also compare this result to a Monte-Carlo simulation (which automatically takes the proper boundary condition into account) and an empirical spin transit time distribution obtained from experimental spin precession measurements. In the strong drift-dominated transport regime, this spin current impulse response can be approximated by multiplying the spin density impulse response by the average drift velocity. However, in weak drift fields, large modeling errors up to a factor of 3 in most-probable spin transit time can be incurred unless the full spin current Green's function is used.

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