Implementation of a nonequilibrium Green’s function method to calculate spin-transfer torque

2008 
We present an implementation of the steady state Keldysh approach in a Green’s function multiple scattering scheme to calculate the nonequilibrium spin density. This density is used to obtain the spin-transfer torque in junctions showing the magnetoresistance effect. We use our implementation to study the spin-transfer torque in metallic Co∕Cu∕Co junctions.
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