Non-equilibrium spin accumulation in ferromagnetic single-electron transistors

Details Non-equilibrium spin accumulation in ferromagnetic single-electron transistors Non-equilibrium spin accumulation in ferromagnetic single-electron transistors

1998-12-14

arxiv.org/abs/cond-mat/9812224v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 postscript figures, to appear in The European Physical Journal B

Scientific paper

10.1007/s100510050784

We study transport in ferromagnetic single-electron transistors. The non- equilibrium spin accumulation on the island caused by a finite current through the system is described by a generalized theory of the Coulomb blockade. It enhances the tunnel magnetoresistance and has a drastic effect on the time- dependent transport properties. A transient decay of the spin accumulation may reverse the electric current on time scales of the order of the spin-flip relaxation time. This can be used as an experimental signature of the non- equilibrium spin accumulation.

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