Dissipationless spin-current between Heisenberg ferromagnets with spin-orbit coupling

Details Dissipationless spin-current between Heisenberg ferromagnets with spin-orbit coupling Dissipationless spin-current between Heisenberg ferromagnets with spin-orbit coupling

2006-04-21

arxiv.org/abs/cond-mat/0604510v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 3 figures, submitted to Europhysics Letters

Scientific paper

A system exhibiting multiple simultaneously broken symmetries offers the opportunity to influence physical phenomena such as tunneling currents by means of external control parameters. Time-reversal symmetry and inversion symmetry are both absent in ferromagnetic metals with substantial spin-orbit coupling. We here study transport of spin in a system consisting of two ferromagnets with spin-orbit coupling separated by an insulating tunneling junction. A persistent spin-current across the junction is found, which can be controlled in a well-defined manner by external magnetic and electric fields. The behavior of the spin-current for important geometries and limits is studied.

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